LAND INFORMATION NEW ZEALAND
BI OSECURITY CONTROL PROGRAMME 2017/18 ANNUAL REPORT
OTAGO REGION
Prepared for and on behalf of LINZ by:
Boffa Miskell Ltd LEVEL 1 | 141 CAMBRIDGE TERRACE PO Box 110 Christchurch 8013, New Zealand Telephone: +64 3 366 88 91 ______Marcus Girvan Date: 4 July 2018 Biosecurity Project Manager Reference: C14086 Boffa Miskell Ltd Status: Final
Reviewed by:
______Pete Caldwell Biosecurity Consultant Boffa Miskell Ltd
Annual Report LINZ Biosecurity Control Programme 2017/18 Otago Region
Table of Contents
1.0 LIST OF LAND DEFINITIONS ...... 1 1.1 Crown Riverbed and Crown Lakebed ...... 1 1.2 Marginal Strips ...... 1 1.3 Road and Esplanade Reserves ...... 1 1.4 Ad Medium Filum Aquae Rights ...... 1
2.0 INTRODUCTION ...... 2 2.1 The Role of Boffa Miskell Ltd ...... 2 2.2 Contents of this Report ...... 2
3.0 UNDERTAKING CONTROL ...... 3
4.0 PRIORITY CONTROL AREAS ...... 4
5.0 COMPLIANCE WITH RESOURCE CONSENTS ...... 5
6.0 LIAISON WITH LANDOWNERS / AGENCIES ...... 6
4 July 2018 Annual Report LINZ Biosecurity Control Programme 2017/18 Otago Region
PART ONE: OVERVIEW
Annual Report LINZ Biosecurity Control Programme 2017/18 Otago Region
1.0 LIST OF LAND DEFINITIONS Land Information New Zealand (LINZ) manages over 5,000 properties across New Zealand. These properties total almost two million hectares, which is around 8% of New Zealand’s land area. Examples of these properties include:
High country pastoral leases in the South Island Crown forest licensed land Former railway properties The beds of many lakes and rivers
LINZ is responsible for biosecurity on land under its management. These are typically areas of unalienated land, such as lakebeds and riverbeds
1.1 Crown Riverbed and Crown Lakebed Land referred to in this report that is managed by LINZ on behalf of the Crown is referred to as Crown land.
In riverbeds, Crown land is often not clearly identified. When undertaking pest control programmes, LINZ applies the following criteria:
1.2 Marginal Strips Marginal Strips are lands of the Crown that are generally adjacent to riverbeds and are administered by the Department of Conservation (DOC). LINZ does not have responsibilities on Marginal Strips.
1.3 Road and Esplanade Reserves Road and Esplanade Reserves are land administered by territorial authorities adjacent to riverbeds (being district councils or unitary authorities). LINZ does not have responsibilities on Road or Esplanade Reserves.
1.4 Ad Medium Filum Aquae Rights In areas where a river abuts a property, the adjoining landowner may own the riverbed to the centre of the river. This is a common law right (unless rebutted) and is known as an ad medium filum aquae (AMF) right. Research has shown that AMF rights are prevalent in South Island braided river systems. LINZ does not have responsibilities on AMF areas.
Page 1 Annual Report LINZ Biosecurity Control Programme 2017/18 Otago Region
2.0 INTRODUCTION LINZ has responsibilities for managing the control of pests on Crown land. For LINZ biosecurity, Crown land generally comprises of areas of braided river or lake bed.
Crown land is subject to high public use and is frequently disturbed, with such circumstances providing ideal habitat for the establishment of many pest species. Such pests can threaten adjoining farmland and conservation land and may also act as sources of new infestations, re-infestation on pest free land, and more generally as a constant source of seed. Given this risk, LINZ undertakes control works to manage pest populations at many sites.
Regional Pest Management Plans (RPMP), which are developed by regional councils under the Biosecurity Act 1993, establish priorities and mechanisms to control various pest species. In the RPMPs, some pests are classified according to their threat to economic values, whilst others have been classified according to their threat to conservation or biodiversity values. The National Policy Direction for Pest Management 2015 (NPD), through the Biosecurity Act 1993 seeks to ensure that pest management activities, under Part 5 of the Act, provide the best use of available resources for New Zealand’s best interests, and align with each other (when necessary), to contribute to the eradication or effective management of harmful organisms present in New Zealand. As a result, the Crown is now bound to comply with specified Good Neighbour Rules (GNRs) within the RPMP.
Pest control programmes undertaken by LINZ aim to initially reduce infestations of pests to low levels so that ongoing control is at a maintenance level. This strategy reduces ongoing costs and ensures previous pest control investments are protected.
2.1 The Role of Boffa Miskell Ltd Boffa Miskell Limited (BML) was appointed as service provider to LINZ and is responsible for the management and coordination of biosecurity services (pest control) on Crown land. BML assumed the management of these services on 1 July 2009, and as of 1 July 2014 has been further engaged in a strategic partnership with LINZ until 2021.
BML’s role includes the following key tasks:
Site inspections Preparation of annual pest control programmes Liaison and consultation with interested parties and stakeholders Preparation of tenders and contracts for the engagement of pest control contractors Monitoring and inspection of operations Monitoring of resource consent compliance Preparing annual reports on control works operations at various sites Reporting on other issues relevant to biosecurity operations
2.2 Contents of this Report This report identifies pest control operations carried out on Crown land in Otago for the financial period of 1 July 2017 to 30 June 2018. During this period, control works operations undertaken included the following:
Aerial spot and boom spraying of gorse, broom, old man’s beard and the lake weed Lagarosiphon major Ground and vehicle-based spraying of gorse, broom, old man’s beard and other woody weeds Diver hand-weeding, suction dredging, bottom lining, mechanical cutting and boat-based submerged boom spraying of Lagarosiphon major
Page 2 Annual Report LINZ Biosecurity Control Programme 2017/18 Otago Region
Rabbit control via pesticides
3.0 UNDERTAKING CONTROL LINZ’s biosecurity annual programme is implemented across New Zealand, and accordingly the need for individual programmes must be balanced against other priorities nationally. LINZ may respond to a biosecurity issue based on several considerations which are outlined below.
LINZ may not undertake control works in some circumstances, which include the following:
If the pest identified is not on Crown land The land in question is under a lease/license or subject to an interest which places responsibility on the lessee or licensee to manage the pest(s) The pest falls under other agencies’ or councils’ overriding national or regional jurisdiction
LINZ may undertake control works in some or all of the following circumstances where:
Directed or indicated as a priority by Government Control works have been carried out historically and ongoing maintenance is required to ensure previous gains in the reduction of the pest are retained The pest has been identified under a RPMP and where the pest has a specified GNR under the regions RPMP The pest is spreading from Crown land to adjacent land, of which that landowner is controlling the pest (LINZ is exacerbating the pest problem) LINZ is a signatory to an Agreement or Memorandum of Understanding which commits LINZ to assisting with control Other parties are contributing to the control of a pest in a coordinated and comprehensive manner The pest is listed in the National Pest Plant Accord The control works are realistically able to be sustained or built on in future years The control will assist in New Zealand’s ability to host international events which contribute to New Zealand’s economy A cost/benefit exercise has identified that the benefits of control greatly exceed the costs
Page 3 Annual Report LINZ Biosecurity Control Programme 2017/18 Otago Region
4.0 PRIORITY CONTROL AREAS Sites treated in the 2017/18 season were selected on the basis of recommendations by BML, consultation with interested parties and subsequent agreement and sign off by LINZ.
Gorse and broom control and containment was identified as being the highest priority along with old man’s beard control, which is a total control pest in Otago. Control and containment of Lagarosiphon major in Lakes Wanaka, Dunstan, Wakatipu and the Kawarau River were also given high priority.
Additionally, high priority was afforded to other programmes where adjacent landowners undertake a comprehensive weed control programme. It is in such circumstances where LINZ seeks to act as a good neighbour to ensure that it is not a source of weed exacerbation.
Other programmes were generally undertaken on the basis of the ability to maintain pest-free areas and build on previous pest control efforts, the ability to reduce the impacts of external infestations, and where budgets allow the continuation or expanding the control site area.
Page 4 Annual Report LINZ Biosecurity Control Programme 2017/18 Otago Region
5.0 COMPLIANCE WITH RESOURCE CONSENTS In the Otago region, the spraying of pest plants in circumstances where the herbicide may enter water is a permitted activity in the Regional Water Plan, so no resource consent was required. However, LINZ holds the following resource consent to enable it to undertake aquatic weed control using tracer dye in Lake Dunstan and Lake Wanaka:
Consent to discharge diquat herbicide and Intracid Rhodamine WT liquid tracer dye into water bodies within the Otago region.
Consent No: Issued by: Expiry Date: RM14.111.01 ORC 20 May 2049
Relevance: Control of Lagarosiphon in Lake Dunstan and Lake Wanaka.
Page 5 Annual Report LINZ Biosecurity Control Programme 2017/18 Otago Region
6.0 LIAISON WITH LANDOWNERS / AGENCIES On behalf of LINZ, BML undertakes ongoing liaison, consultation and notification with various parties in accordance with resource consents and obligations to LINZ. BML also require their contractors, who deliver the physical control works, to notify adjacent land holders and other interested parties as appropriate with a sufficient notification period.
BML liaised with the following parties in the Otago region in the course of developing control works programmes for the financial year:
Otago Regional Council (ORC) The Department of Conservation Central Otago District Council Queenstown Lakes District Council Te Runanga o Ngai Tahu and Papatipu Runanga Central Otago Wine Growers Association Contact Energy Ltd The Guardians of Lake Wanaka The Guardians of Lake Dunstan Cromwell and Districts Community Trust Clutha Fisheries Trust Forest & Bird Otago Beekeepers Federated Farmers Public Health South Fish & Game Otago
Page 6 Annual Report LINZ Biosecurity Control Programme 2017/18 Otago Region
PART TWO: CONTROL WORKS
Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 4.5 9 13.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Cardrona River • Gun and hose control method was used to control gorse Site: Cardrona Township to Clutha River and broom in the riverbed • Good progress is being made right throughout the site District: Queenstown-Lakes Region: Otago Reference: 95014_1 Pest: Broom, Gorse
Treatment method: Gun and Hose
Application method: Herbicide Proposed Future Work: Actual Start Date: 31/05/2018 Continue similar programme next year to maintain low Actual End Date: 01/06/2018 densities of broom and gorse. Site area: 265.1ha
Page 8 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 6 12 18 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Clutha River • Old man’s beard control was undertaken on the Clutha Site: Lower Clutha from Roxburgh Dam River with the aim to prevent spread into the Blue to Miller Flat Mountains District: Central Otago • Gun and hose spraying as well as using Tordon prill Region: Otago application was carried out, targeting areas where access Reference: 95013_1 was limited Pest: Old Man’s Beard
Treatment method: Gun and Hose
Application method: Herbicide Proposed Future Work: Actual Start Date: 02/03/2018 The areas which require future control are south of Actual End Date: 25/05/2018 Beaumont down to Blackcleugh Road and Beaumont to Site area: 347.3ha Ettrick on the true right of Clutha River.
Page 9 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 1 2 3 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Clutha River • Old mans beard control was undertaken using a number of Site: Upstream of Alexandra bridge techniques • Plants were treated using gun and hose spraying as well as District: Central Otago cut and pasting where feasible Region: Otago Reference: 95013_2 Pest: Old Man’s Beard
Treatment method: Gun and Hose, Cut and paste
Application method: Herbicide Proposed Future Work: Actual Start Date: 02/02/2018 Continue with similar level of control next season to further Actual End Date: 23/02/2018 suppress infestations. Site area: 294.1ha
Page 10 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 1 2 3 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Dart River • Plants spot sprayed using the aerial wanding/lancing Site: Below the Dart Bridge to Lake technique from a Hughes 500 helicopter Wakatipu • To prioritise control in limited time, plants that were not District: Queenstown-Lakes easily accessible by ground were targeted first Region: Otago • DOC manages control at this site with contributions from Reference: 95023_1 LINZ Pest: Broom, Gorse
Treatment method: Gun and Hose
Application method: Helicopter Proposed Future Work: Actual Start Date: 07/04/2018 Continued collaboration with the DOC programme working Actual End Date: 07/04/2018 downstream is recommended to ensure that the gorse Site area: 816.9ha and broom infestations are brought down to maintenance status.
Page 11 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Greenstone River • Gorse and broom treated using gun and hose Site: Lower Greenstone River • Where areas were more difficult to access, Tordon prills where used to control both species District: Queenstown-Lakes Region: Otago Reference: 95016_1 Pest: Broom, Gorse
Treatment method: Gun and Hose
Application method: Herbicide Proposed Future Work: Actual Start Date: 03/04/2018 Control work of a similar nature will be required in the Actual End Date: 03/04/2018 2018/19 season to maintain control of seedling regrowth. Site area: 22.9ha
Page 12 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 1.5 3 4.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Kakanui River • Gun and hose control was used to control patches of old Site: Crown Hill Rd to below Gemmells man’s beard in and along the river Crossing • Patches of old man’s beard were found amongst willow District: Waitaki trees and other vegetation, mostly downstream from Region: Otago Gemmell’s Crossing Reference: 95011_3 Pest: Broom, Old Man’s Beard
Treatment method: Gun and Hose
Application method: Herbicide Proposed Future Work: Actual Start Date: 08/05/2018 Control work of a similar nature will be required next Actual End Date: 09/05/2018 season to maintain control of seedling regrowth and to Site area: 163.3ha ensure plants do not seed.
Page 13 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.5 1 1.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Kawarau River • 7.21 hectares of lagarosiphon was treated with diquat in Site: Upper Kawarau River gel form applied via submerged boat boom • Hand weeding was carried out along the upper true-left District: Queenstown-Lakes bank Region: Otago • Some hessian maintenance was carried out, along with an Reference: 95026_2 assessment of submerged willows in the river Pest: Lagarosiphon Major
Treatment method: Diver, Boat
Application method: Herbicide, Mechanical Proposed Future Work: Actual Start Date: 19/08/2017 It is proposed that the weedbeds within the river are Actual End Date: 22/05/2018 controlled via diver-based methods where appropriate, Site area: 65.8ha with herbicide to be used to reduce lagarosiphon biomass. Lagarosiphon transfer via boats from this section of the river into Lake Wakatipu continues to be a risk.
Page 14 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.5 1 1.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Kawarau River • Old Man’s beard control was undertaken using a helicopter Site: Upper Kawarau River boom • 4 hectares was controlled in the main infestation with District: Queenstown-Lakes some smaller patches also controlled downstream Region: Otago Reference: 95026_3 Pest: Old Man’s Beard.
Treatment method: Helicopter
Application method: Herbicide, Proposed Future Work: Actual Start Date: 29/03/2018 Further control may be required next season after weed Actual End Date: 29/03/2018 densities have been assessed. Site area: 65.8ha
Page 15 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Kyeburn • Ground control of gorse and broom took place this season Site: Upstream of Kyeburn diggings to maintain the low infestation levels at this site • Seedling regrowth is appearing throughout the site, these District: Central Otago were controlled using gun and hose methods Region: Otago Reference: 95018_1 Pest: Broom, Gorse
Treatment method: Gun and Hose
Application method: Herbicide Proposed Future Work: Actual Start Date: 10/05/2018 Further control work will be required in the 2018/19 season Actual End Date: 10/05/2018 to maintain the low levels of broom and gorse at this site. Site area: 7.7ha
Page 16 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • A boat-mounted cutter bar was used to cut the weed Site: Bannockburn Inlet approximately 1.5m below the lakes’ surface • Hand removal of weed was carried out in the vicinity of the District: Central Otago boat ramp Region: Otago • Work is carried out in conjunction with Contact Energy and Reference: 95001_1 ORC Pest: Lagarosiphon Major
Treatment method: Diver, Boat
Application method: Mechanical Proposed Future Work: Actual Start Date: 06/11/2017 The use of the cutter bar has served to promote fresh, green Actual End Date: 08/05/2018 growth of lagarosiphon, making it susceptible to diquat. Site area: 5.4ha Continued control using these two techniques will be utilised if required next season.
Page 17 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • Hand removal of weed was carried out in the vicinity of the Site: Bendigo Boat Ramp and boat ramp and its approaches Approaches • A boat mounted cutter was used to cut the weed District: Central Otago approximately 1.5m below the lakes surface Region: Otago • 2.76 hectares of weed was treated via boat based boom Reference: 95001_2 • 22 hectares of lagarosiphon was treated using aerial application of diquat, this was carried out in June 2018 Pest: Lagarosiphon Major • Work is carried out in conjunction with Contact Energy and ORC Treatment method: Helicopter, Boat, Diver
Application method: Herbicide, Mechanical Proposed Future Work: Actual Start Date: 30/04/2018 A large lagarosiphon infestation exists at the head of Lake Actual End Date: 14/06/2018 Dunstan, therefore Bendigo boat ramp often becomes Site area: 9.6ha enclosed in surface-reaching weed. Continued control will be required to ensure boat access is retained.
Page 18 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.6 1.2 1.8 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • A boat mounted cutter was used to cut the weed Site: Champagne Gully Ramp and Ski approximately 1.5m below the lakes surface Lane • Lagrosiphon was removed by hand from the immediate District: Central Otago vicinity of the boat ramp Region: Otago • Work is carried out in conjunction with Contact Energy and Reference: 95001_4 ORC Pest: Lagarosiphon Major
Treatment method: Boat, Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 06/11/2017 This site is a popular boat launching ramp for recreational Actual End Date: 01/05/2018 users, therefore control will likely be required again in the Site area: 14.9ha 2018/19 season.
Page 19 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • A boat-mounted cutter bar was used to cut the weed Site: Old Cromwell Town and Boat approximately 1.5m below the lakes’ surface Ramps • Hand removal of weed was carried out in the vicinity of the District: Central Otago boat ramp and jetty Region: Otago • Suction dredging was carried out at Butchers Drive boat Reference: 95001_6 ramp and a around a frequently used swimming area next to the jetty Pest: Lagarosiphon Major • Work is carried out in conjunction with Contact Energy and ORC Treatment method: Diver, Boat
Application method: Herbicide, Mechanical Proposed Future Work: Actual Start Date: 19/10/2017 The use of the cutter bar has served to promote fresh, green Actual End Date: 18/05/2018 growth of lagarosiphon, making it susceptible to diquat. Site area: 6.9ha Continued control using the cutter, herbicide and divers will be utilised next season.
Page 20 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • Weed cutting was planned, however the weedbed was Site: Pisa Moorings deeper than 1.5m and no weed was cut • 3 hectares of lagarosiphon was treated with diquat in gel District: Central Otago form Region: Otago • Hand weeding using divers was carried out around the Reference: 95001_7 boat ramp • Work is carried out in conjunction with Contact Energy and Pest: Lagarosiphon Major ORC Treatment method: Boat, Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 07/11/2017 The use of the cutter bar has served to promote fresh, green Actual End Date: 15/05/2018 growth of lagarosiphon, making it susceptible to diquat. Site area: 6.9ha Continued control using these two techniques will be utilised next season if required.
Page 21 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • A boat-mounted cutter bar was used to cut the weed Site: Cromwell Swimming Beach approximately 1.5m below the lakes surface • 9 hectares was sprayed using a combination of aerial and District: Central Otago boat based application methods Region: Otago • Work is carried out in conjunction with Contact Energy and Reference: 95001_9 ORC Pest: Lagarosiphon Major
Treatment method: Helicopter, Boat
Application method: Herbicide, Mechanical Proposed Future Work: Actual Start Date: 06/11/2017 The use of the cutter bar has served to promote fresh, green Actual End Date: 14/06/2018 growth of lagarosiphon, making it susceptible to diquat. Site area: 2.1ha Continued control using these two techniques will be utilised if required next season.
Page 22 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • A boat-mounted cutter bar was used to cut the weed Site: Jacksons approximately 1.5m below the lakes surface in November 2017 District: Central Otago • Work is carried out in conjunction with Contact Energy and Region: Otago ORC Reference: 95001_10 Pest: Lagarosiphon Major
Treatment method: Boat
Application method: Mechanical Proposed Future Work: Actual Start Date: 06/11/2017 The use of the cutter bar has served to promote fresh, green Actual End Date: 06/11/2017 growth of lagarosiphon, making it susceptible to diquat. Site area: 7.5ha Continued control using these two techniques will be utilised if required next season.
Page 23 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.3 0.6 0.9 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • A boat-mounted cutter bar was used to cut the weed Site: Lowburn Inlet approximately 1.5m below the lakes surface in November 2017 District: Central Otago • 2.85 hectares of boat herbicide was applied at the site Region: Otago • Work is carried out in conjunction with Contact Energy and Reference: 95001_11 ORC Pest: Lagarosiphon Major
Treatment method: Boat
Application method: Herbicide, Mechanical Proposed Future Work: Actual Start Date: 07/11/2017 The use of the cutter bar has served to promote fresh, green Actual End Date: 15/05/2018 growth of lagarosiphon, making it susceptible to diquat. Site area: 6.8ha Continued control using these two techniques will be utilised if required next season.
Page 24 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.3 0.6 0.9 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • 2.35 hectares of lagarosiphon was treated with diquat in Site: McNulty’s Inlet gel form • Weed was removed by hand around the boat ramp and District: Central Otago jetty Region: Otago • Work is carried out in conjunction with Contact Energy and Reference: 95001_12 ORC Pest: Lagarosiphon Major
Treatment method: Diver, Boat
Application method: Herbicide Proposed Future Work: Actual Start Date: 14/05/2018 The use of the cutter bar has served to promote fresh, green Actual End Date: 15/05/2018 growth of lagarosiphon, making it susceptible to diquat. Site area: 1.9ha Continued control using these two techniques will be utilised if required next season.
Page 25 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • Hand removal of weed was carried out in the vicinity of the Site: Weatherall Creek and Burton boat ramp, floating jetties and creeks Creek • Work is carried out in conjunction with Contact Energy and District: Central Otago ORC Region: Otago Reference: 95001_17 Pest: Lagarosiphon Major
Treatment method: Boat, Diver
Application method: Herbicide, Mechanical Proposed Future Work: Actual Start Date: 16/05/2018 Next season the cutter bar will be used followed by diquat Actual End Date: 16/05/2018 application if conditions permit. Site area: 1.9ha
Page 26 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • 1.35 hectares of lagarosiphon was treated with diquat in Site: Northburn Ski Lane gel form via boat, and 1 hectare via helicopter • Weed was removed by hand around the boat ramp District: Central Otago • Submerged cutting of weed was carried out prior to Region: Otago herbicide treatment Reference: 95001_19 • Work is carried out in conjunction with Contact Energy and ORC Pest: Lagarosiphon Major
Treatment method: Diver, Helicopter, Boat
Application method: Herbicide, Mechanical Proposed Future Work: Actual Start Date: 13/05/2018 The use of the cutter bar has served to promote fresh, green Actual End Date: 14/06/2018 growth of lagarosiphon, making it susceptible to diquat. Site area: 1.8ha Continued control using these two techniques will be utilised if required next season.
Page 27 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 3 6 9 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • Pindone carrot was used to control high rabbit numbers Site: Foreshore alongside Lake Dunstan and DOC land • This control operation was carried out in conjunction with District: Central Otago DOC Region: Otago Reference: 95001_22 Pest: Rabbits
Treatment method: Poisoning
Application method: Pesticide Proposed Future Work: Actual Start Date: 09/08/2018 Follow-up rabbit shooting may be required to maintain Actual End Date: 29/08/2018 low rabbit numbers. Future poison operations may be Site area: 209.2ha carried out as part of coordinated control with adjoining landowners.
Page 28 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • 1.35 hectares of lagarosiphon was treated with diquat in Site: Devils Creek gel form via boat and helicopter • Work is carried out in conjunction with Contact Energy and District: Central Otago ORC Region: Otago Reference: 95001_24 Pest: Lagarosiphon Major
Treatment method: Helicopter, Boat
Application method: Herbicide Proposed Future Work: Actual Start Date: 15/05/2018 The use of the cutter bar has served to promote fresh, green Actual End Date: 14/06/2018 growth of lagarosiphon, making it susceptible to diquat. Site area: 1.2ha Continued control using these two techniques will be utilised if required next season.
Page 29 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • A boat-mounted cutter bar was used to cut the weed Site: South of Brewery Creek approximately 1.5m below the lakes surface in November 2017 District: Central Otago • Work is carried out in conjunction with Contact Energy and Region: Otago ORC Reference: 95001_25 Pest: Lagarosiphon Major
Treatment method: Boat
Application method: Herbicide, Mechanical Proposed Future Work: Actual Start Date: 06/11/2017 The use of the cutter bar has served to promote fresh, green Actual End Date: 06/11/2017 growth of lagarosiphon, making it susceptible to diquat. Site area: 1.2ha Continued control using these two techniques will be utilised if required next season.
Page 30 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.3 0.6 0.9 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • Hand removal of lagarosiphon was carried out in the Site: Dairy Creek vicinity of the boat ramp • Work is carried out in conjunction with Contact Energy and District: Central Otago ORC Region: Otago Reference: 95001_26 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 15/05/2018 The use of the cutter bar has served to promote fresh, green Actual End Date: 15/05/2018 growth of lagarosiphon, making it susceptible to diquat. Site area: 0.7ha Continued control using these two techniques will be utilised if required next season.
Page 31 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Dunstan • 2.17 hectares of lagarosiphon was treated with diquat in Site: Lowburn Boat Harbour gel form • Hand removal of weed was carried out in the vicinity of the District: Central Otago boat ramp Region: Otago • Work is carried out in conjunction with Contact Energy and Reference: 95001_27 ORC Pest: Lagarosiphon Major
Treatment method: Boat, Diver
Application method: Herbicide, Mechanical Proposed Future Work: Actual Start Date: 06/11/2017 The use of the cutter bar has served to promote fresh, green Actual End Date: 15/05/2018 growth of lagarosiphon, making it susceptible to diquat. Site area: 7ha Continued control using these two techniques will be utilised if required next season.
Page 32 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 4.5 9 13.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Hawea • Control of gorse and broom along the shoreline was carried Site: Western Shoreline out using gun and hose methods • Good progress is being made throughout the site District: Queenstown-Lakes Region: Otago Reference: 95006_2 Pest: Broom, Gorse
Treatment method: Gun and Hose
Application method: Herbicide Proposed Future Work: Actual Start Date: 14/05/2018 Continued control in the 2018/19 season is required to Actual End Date: 15/05/2018 maintain low densities of gorse and broom at this site. Site area: 337.9ha
Page 33 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.8 1.6 2.4 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wakatipu • Surveillance and hand weeding was carried out 4 times in Site: Frankton Arm the 2017/18 season • Approximately 7 days of surveillance was carried out in District: Queenstown-Lakes total Region: Otago • A number of scattered plants were removed, most were Reference: 95028_1 found just upstream of the Kawarau Falls Bridge and some around the Frankton Marina Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 14/08/2017 Low lake levels increase the risk of boats transmitting weed Actual End Date: 23/05/2018 from the Kawarau River into the Frankton Arm. Diver-based Site area: 578.1ha surveillance will be carried out a minimum of 3 times next season to detect lagarosiphon plants at an early age.
Page 34 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wakatipu • Surveillance was carried out 3 times this season Site: Queenstown Bay • No plants were found • A total of 15 hours of surveillance was carried out District: Queenstown-Lakes Region: Otago Reference: 95028_2 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 14/08/2017 Surveillance is recommended to be carried out at this site 3 Actual End Date: 05/05/2018 times per year to ensure that all new incursions are found Site area: 40.2ha and removed. Particular emphasis is to be placed at the site of the infestation found in the 2016/17 season.
Page 35 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 6 12 18 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wakatipu • Full lake surveillance was carried out this season Site: Entire Lake • A small number of immature lagarosiphon plants were identified and removed at Kingston District: Queenstown-Lakes • This site was surveyed a further 2 times and a small Region: Otago number of plants removed at each visit Reference: 95028_3 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 18/08/2017 Due to the scattered lagarosiphon found at Kingston, this Actual End Date: 03/06/2018 site is be surveyed at least 3 times in the 2018/19 season. Site area: 28968.7ha It is vital that new incursions are detected and removed swiftly to ensure against lagarosiphon establishment in this lake.
Page 36 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Hessian was laid around the new jetty and between the Site: Roys Bay Boat Ramp and Jetty boat ramps • Maintenance was carried out on the hessian late in the District: Queenstown-Lakes season as some had been dislodged through ‘prop’ wash Region: Otago over the summer months Reference: 95027_1 • Re-infestation of lagarosiphon occurs rapidly due to the adjoining large weedbeds Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 16/10/2017 Further work is scheduled at this site next season to keep Actual End Date: 19/02/2018 this boat ramp clear of lagarosiphon. Site area: 0.3ha
Page 37 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Hessian material was laid and secured to the lakebed Site: Roys Bay • Lagarosiphon was controlled using boat-based herbicide • 1.5 hectares of diquat in gel form was applied in May 2018 District: Queenstown-Lakes • Progress of control is very apparent Region: Otago Reference: 95027_2 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Herbicide Proposed Future Work: Actual Start Date: 12/10/2017 Continue with bottom lining supported by chemical Actual End Date: 16/05/2018 application to further reduce this weedbed. Site area: 56.7ha
Page 38 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Submerged surveys were carried out, with divers employing Site: Ruby Island hand weeding techniques as required District: Queenstown-Lakes Region: Otago Reference: 95027_3 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 10/10/2017 This site is to be controlled by divers to ensure any new Actual End Date: 04/06/2018 infestations are removed. Site area: 2.3ha
Page 39 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • 2 days submerged surveying was carried out for the first Site: Glendhu Coastline time at this site District: Queenstown-Lakes Region: Otago Reference: 95027_5 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 05/10/2017 Next season this site is proposed to be hand weeded twice Actual End Date: 08/06/2018 to ensure that any re-infestation or regrowth is removed. Site area: 7.8ha
Page 40 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Submerged surveys were carried out at this site, with hand Site: Glendhu bay weeding employed where required • One day of hessian bottom lining was carried out at the District: Queenstown-Lakes eastern end of this site Region: Otago Reference: 95027_6 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 27/09/2017 Continued control will be required at this site in the Actual End Date: 29/05/2018 2018/19 season. Suction dredging or possibly bottom lining Site area: 3.7ha is proposed to further remove weed from this site.
Page 41 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Hand weeding was carried out to remove any lagarosiphon Site: Glendhu Bay Boat Ramp near the boat ramp District: Queenstown-Lakes Region: Otago Reference: 95027_7 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 27/10/2017 The Glendhu Bay boat ramp is a well used amenity and Actual End Date: 27/10/2017 needs to remain free of lagarosiphon to reduce the risk of Site area: 0.2ha weed transmission to other lakes. Follow-up hand weeding is planned for next season.
Page 42 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Hand weeding around the boat ramp was carried out twice Site: Fern Burn this season • Boat based herbicide treatment was also carried out and District: Queenstown-Lakes 3.5 hectares of lagarosiphon was treated Region: Otago Reference: 95027_8 Pest: Lagarosiphon Major
Treatment method: Diver, Boat
Application method: Herbicide, Mechanical Proposed Future Work: Actual Start Date: 27/08/2017 Further hand weeding and boat based herbicide application Actual End Date: 01/06/2018 will be required in the 2018/2019 season to control Site area: 2ha lagarosiphon.
Page 43 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Maintenance of hessian and hand weeding above and Site: Parkins Bay below the hessian line was carried out • Some additional hessian was laid to ensure all weed was District: Queenstown-Lakes controlled Region: Otago • 1.4 hectares of weed was treated with diquat via boat Reference: 95027_9 Pest: Lagarosiphon Major
Treatment method: Diver, Boat
Application method: Herbicide Proposed Future Work: Actual Start Date: 04/11/2017 Further bottom lining is recommended next season once Actual End Date: 16/05/2018 the weed biomass is reduced from diquat treatment. Site area: 51ha
Page 44 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Approximately 0.36 hectares of boat-based herbicide Site: Glendhu Bluff Bay treatment was carried out at this site • This work follows successful herbicide results from last District: Queenstown-Lakes season Region: Otago • Young, clean lagarosiphon regrowth was targeted Reference: 95027_10 Pest: Lagarosiphon Major
Treatment method: Boat
Application method: Herbicide Proposed Future Work: Actual Start Date: 16/05/2018 Further herbicide control is proposed to be carried in Actual End Date: 16/05/2018 2018/19. If excellent herbicide results are achieved, bottom Site area: 57.1ha lining may be employed.
Page 45 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Hand weeding was carried out, as well as repairing and Site: Paddock Bay replacing any worn hessian • 6.28 hectares of weed was treated with diquat via boat District: Queenstown-Lakes to further desiccate weed that was treated with diquat last Region: Otago season Reference: 95027_11 Pest: Lagarosiphon Major
Treatment method: Diver, Boat
Application method: Herbicide, Mechanical Proposed Future Work: Actual Start Date: 08/10/2017 Hand weeding of the dredged sites and further bottom Actual End Date: 16/05/2018 lining with hessian is proposed to be carried out in Site area: 97.5ha 2018/19. Herbicide will be used if required on the taller weedbeds.
Page 46 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Hand weeding was carried out to keep the areas dredged Site: Sandspit last season free of lagarosiphon • Hand weeding was carried out twice this season District: Queenstown-Lakes Region: Otago Reference: 95027_12 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 09/10/2017 Follow-up hand weeding will be required at this site twice Actual End Date: 27/05/2018 next season where suction dredging has been carried out. Site area: 1.9ha Further suction dredging will be considered to remove all lagarosiphon from this site.
Page 47 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.6 1.2 1.8 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Hand weeding of scattered and isolated plants was carried Site: Bishops Bay out twice this season • 46 hours of hand weeding was carried out in total District: Queenstown-Lakes Region: Otago Reference: 95027_13 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 02/10/2017 Follow-up hand weeding will be required at this site twice Actual End Date: 20/02/2018 next season to ensure against re-infestation and regrowth. Site area: 14.9ha
Page 48 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Submerged survey was carried out with divers employing Site: Roys Peninsula hand weeding techniques as required • A small number of scattered plants were removed District: Queenstown-Lakes Region: Otago Reference: 95027_14 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 02/10/2017 Follow-up hand weeding will be required at this site next Actual End Date: 04/06/2018 season to ensure against re-infestation and regrowth. Site area: 13.2ha
Page 49 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Matukituki Rivermouth • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_15 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 10/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 10/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 7ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in September 2018.
Page 50 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Submerged survey was carried out with divers employing Site: West Wanaka Bay hand weeding techniques as required • One plant was found and removed this season District: Queenstown-Lakes Region: Otago Reference: 95027_16 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 30/09/2017 This site is normally only surveyed once every 18 months, Actual End Date: 04/06/2018 however this will now be included with a number of other Site area: 2.9ha sites on a 6 month rotation.
Page 51 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.6 1.2 1.8 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed twice this season, as it appears to be Site: Colquhouns Coast a consistent collection point for lagarosiphon fragments • A small number of scattered plants were removed District: Queenstown-Lakes Region: Otago Reference: 95027_17 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 30/09/2017 Lagrosiphon is frequently found in very low densities at this Actual End Date: 02/06/2018 site so it is proposed that it is surveyed every six months to Site area: 14.4ha ensure that it remains free of any lagarosiphon.
Page 52 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.8 1.6 2.4 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Rumbling Burn • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_18 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 06/10/2017 Lagarosiphon is frequently found in very low densities at Actual End Date: 23/02/2018 this site, therefore it is surveyed once every six months to Site area: 38.9ha ensure it remains clear of all lagarosiphon.
Page 53 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 1 2 3 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed twice this season, in October and in Site: Minaret Burn Febuary • Isolated small plants were found and removed District: Queenstown-Lakes Region: Otago Reference: 95027_19 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 08/10/2017 It is proposed that this site is surveyed once every 6 months Actual End Date: 22/02/2018 to ensure it remains clear of all lagarosiphon. Site area: 102.8ha
Page 54 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.5 1 1.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Minaret Bay • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_20 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 03/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 03/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 185.4ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in March 2019.
Page 55 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.6 1.2 1.8 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Rough Burn • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_21 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 03/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 03/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 29.9ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in October 2018.
Page 56 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.5 1 1.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Snag Bay • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_22 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 03/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 03/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 152.4ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in October 2018.
Page 57 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.6 1.2 1.8 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Albert Burn Delta • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_23 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 05/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 05/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 31.4ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in October 2018.
Page 58 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.6 1.2 1.8 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Craigie Burn • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_24 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 05/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 05/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 22.6ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in October 2018.
Page 59 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Makarora Delta • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_25 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 05/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 05/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 87.2ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in October 2018.
Page 60 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.5 1 1.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Wharf Creek • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_26 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 05/10/2017 It is proposed that this site is surveyed once every 12 Actual End Date: 05/10/2017 months to ensure it remains clear of all lagarosiphon. Site area: 30ha
Page 61 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Windy Point • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_27 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 09/10/2017 It is proposed that this site is surveyed once every 12 Actual End Date: 09/10/2017 months to ensure it remains clear of all lagarosiphon. Site area: 21.9ha
Page 62 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.6 1.2 1.8 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Sheepskin Creek • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_28 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 09/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 09/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 62.5ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in March 2019.
Page 63 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.6 1.2 1.8 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Camp Creek • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_29 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 09/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 09/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 66.5ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in October 2018.
Page 64 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.6 1.2 1.8 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: The Neck • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_30 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 09/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 09/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 45.2ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in October 2018.
Page 65 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 1 2 3 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Mt Burke • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_31 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 10/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 10/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 88.6ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in October 2018.
Page 66 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.5 1 1.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed once this season Site: Stoney Creek • No plants were found at this site District: Queenstown-Lakes Region: Otago Reference: 95027_32 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 10/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 10/10/2017 months to ensure it remains clear of all lagarosiphon, Site area: 31.5ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in October 2018.
Page 67 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed twice this season Site: Mou Waho Island • A few isolated plants were removed in the September inspection, totalling 5 catch bags District: Queenstown-Lakes • Hessian was laid over the area Region: Otago • A small number of scattered plants were removed in the Reference: 95027_33 February inspection Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 01/10/2017 It is proposed that this site is surveyed every 6 months to Actual End Date: 24/02/2018 ensure it remains clear of lagarosiphon. Site area: 16.1ha
Page 68 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.6 1.2 1.8 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed twice this season Site: The Peninsula North End • Four plants were found and removed District: Queenstown-Lakes Region: Otago Reference: 95027_34 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 01/10/2017 It is proposed that this site is surveyed once every 18 Actual End Date: 24/02/2018 months to ensure it remains clear of all lagarosiphon, Site area: 14.3ha however due to the low lake levels over the winter, the chance of weed dispersal within Lake Wanaka is increased. Consequently, this site is proposed to be surveyed in March 2019.
Page 69 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed twice this season Site: Fishermans Cove • Few lagarosiphon plants were removed during the May survey District: Queenstown-Lakes Region: Otago Reference: 95027_35 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 29/09/2017 It is proposed that this site is surveyed once every 6 months Actual End Date: 26/05/2018 to ensure it remains clear of all lagarosiphon. Site area: 2.6ha
Page 70 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed twice this season Site: Mou Tapu Island • 3 plants were removed in total District: Queenstown-Lakes Region: Otago Reference: 95027_36 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 09/10/2017 It is proposed that this site is surveyed twice per year to Actual End Date: 24/02/2018 ensure it remains clear of all lagarosiphon. Site area: 11.8ha
Page 71 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.8 1.6 2.4 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed twice this season Site: The Peninsula West Coast • Isolated single plants were found and removed District: Queenstown-Lakes Region: Otago Reference: 95027_37 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 29/09/2017 It is proposed that this site is surveyed twice each year to Actual End Date: 26/05/2018 ensure it remains clear of all lagarosiphon. Site area: 16ha
Page 72 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed twice this season, in October and in Site: The Peninsula South June • A number of isolated plants were identified and removed District: Queenstown-Lakes Region: Otago Reference: 95027_38 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 10/10/2017 This site is prone to re-invasion from extensive weedbeds in Actual End Date: 06/06/2018 Stevensons Arm and Roys Bay, therefore it is proposed that Site area: 5.3ha this site is surveyed twice in the 2018/19 season to ensure it remains clear of all lagarosiphon.
Page 73 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Hessian material was repaired and hand weeding was Site: Stevensons Island carried out in the area that was dredged last year around the main beach at Stevensons Island District: Queenstown-Lakes • 1 day of bottom lining was carried out on the eastern end Region: Otago of the beach Reference: 95027_42 • 11 hectares of weed was treated with diquat Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical, Boat Proposed Future Work: Actual Start Date: 08/11/2017 Follow-up hand weeding of this dredged site will be Actual End Date: 05/06/2018 required in the 2018/19 season along with some possible Site area: 11.1ha further herbicide treatment if conditions permit.
Page 74 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • Two days of hand weeding was carried out in November Site: Quartz Creek and May to maintain the dredged site free of weed District: Queenstown-Lakes Region: Otago Reference: 95027_43 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 07/11/2017 Further suction dredging or hand weeding will be required Actual End Date: 28/05/2018 to maintain this boat ramp free from weed, which has the Site area: 6.1ha potential to be transferred to other lakes by boat users.
Page 75 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 0.4 0.8 1.2 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lake Wanaka • This site was surveyed twice this season Site: Eely Point • A number of plants were removed by hand in the previously dredged area District: Queenstown-Lakes Region: Otago Reference: 95027_48 Pest: Lagarosiphon Major
Treatment method: Diver
Application method: Mechanical Proposed Future Work: Actual Start Date: 06/11/2017 Follow-up hand weeding will be required to remove any Actual End Date: 10/04/2018 re-infestation or regrowth from this site. weed is to be Site area: 12.5ha maintained at low density’s in the shallow areas of this highly popular site.
Page 76 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 2 4 6 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Lochy River • Gun and hose ground control as well as aerial spot spraying Site: Upstream of Lake Wakatipu of isolated plants was carried out this season • The Lochy River contains heavy infestations of re-emerging District: Queenstown-Lakes seedlings of gorse and broom from the large amount of Region: Otago viable seed in the ground Reference: 95008_1 Pest: Broom, Gorse
Treatment method: Helicopter, Gun and Hose
Application method: Herbicide Proposed Future Work: Actual Start Date: 28/04/2018 A continuation of aerial and ground-based control Actual End Date: 06/05/2018 efforts will be required for the 2018/19 season to further Site area: 92.6ha reduce the current broom and gorse infestations, and complementing control works carried out on adjacent properties.
Page 77 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 2.5 5 7.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Makarora River • Ground control of broom and gorse took place throughout Site: Upstream of Lake Wanaka the site • Mainly scattered bushes throughout the site District: Queenstown-Lakes • The main island across from Makarora has high levels of Region: Otago broom and gorse infestations Reference: 95005_1 Pest: Broom, Gorse
Treatment method: Gun and Hose
Application method: Herbicide Proposed Future Work: Actual Start Date: 15/05/2018 A continuation of ground control will be required at this site Actual End Date: 05/06/2018 in 2018/19 to further suppress weeds in this area. Site area: 928.4ha
Page 78 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 2.5 5 7.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Manuherikia River • 17 hectares of land was treated with aerial 1080 carrot to Site: Omakau to Pumphouse Flat control rabbits at this site • 2 carrot pre-feeds were followed by the toxic application District: Central Otago • Work was carried out in conjunction with DOCand an Region: Otago adjoining farmer Reference: 95024_1 Pest: Rabbits
Treatment method: Helicopter
Application method: Pesticide Proposed Future Work: Actual Start Date: 25/08/2017 Further control may be required next season after rabbit Actual End Date: 10/09/2017 densities have been assessed. Site area: 547.4ha
Page 79 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 3 6 9 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Nevis River • Gun and hose control was undertaken upstream of the Site: Commissioner Creek downstream Nevis Crossing to Kawarau confl. • The majority of weeds encountered were young plants District: Central Otago, Queenstown-Lakes Region: Otago Reference: 95009_1 Pest: Broom, Gorse
Treatment method: Gun and Hose
Application method: Herbicide Proposed Future Work: Actual Start Date: 15/05/2018 Similar level of ground control will be required for the Actual End Date: 15/05/2018 2018/19 season. Aerial control will continue with aerial Site area: 132.4ha boom spraying possibly being required in some areas with larger infestations.
Page 80 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 3 6 9 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Rees River • Plants were spot sprayed using aerial wanding Site: Hunter Creek to Dart River • To prioritise the control in limited time, plants that were not easily accessible by ground were targeted first District: Queenstown-Lakes • DOC manages control at this site with contributions from Region: Otago LINZ Reference: 95022_1 Pest: Broom, Gorse
Treatment method: Helicopter, Gun and Hose
Application method: Herbicide Proposed Future Work: Actual Start Date: 07/04/2018 Similar level of control is required to ensure very low Actual End Date: 07/04/2018 densities are maintained, more ground control required Site area: 416.9ha next season.
Page 81 Legend Ground Control* Rabbit Control* Cutter Control* Boat Control* Diver Control* Aerial Control* Sensitive area Site extent All Sites 0 1.5 3 4.5 km * Shows works carried out in the 2017/18 season DOC
BIOSECURITY WORKS 2017/18 Control Works Specifications Work Detail: Property: Waianakarua River • The lower section has scattered bushes, further up the river Site: North Branch the infestation becomes denser • Large faces out of the river are heavily infested and act as a District: Waitaki seed source Region: Otago Reference: 95010_2 Pest: Broom, Gorse
Treatment method: Helicopter
Application method: Herbicide Proposed Future Work: Actual Start Date: 09/01/2018 Continuing control work is required for the 2018/19 season Actual End Date: 09/01/2018 to maintain a low density of gorse and broom in the middle Site area: 63.2ha and lower reaches of this site. Nearer the top of the river their is a massive infestation of hundreds of hectares.
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