Hosts of Quarantine Pests: NAPPRA Round 3, Effective July 02, 2021

Total Page:16

File Type:pdf, Size:1020Kb

Hosts of Quarantine Pests: NAPPRA Round 3, Effective July 02, 2021 Hosts of Quarantine Pests: NAPPRA Round 3, Effective July 02, 2021 Host Plant Countries from which importation is Propagative plant parts Quarantine Pests Genera not authorized regulated under NAPPRA All Myrtaceae taxa: including Austropuccinia psidii Acca, (Sphaerophragmiaceae) and other Eucalyptus, All countries when destined to Hawai'i All propagules except seeds quarantine pests Eugenia, Rhodomyrtus and Syzygium Black Currant Reversion Virus, BRV (Nepovirus, Secoviridae) and other Ribes All countries except Canada All propagules except seeds quarantine pests Brevipalpus chelensis (Tenuipalpidae) and other quarantine pests Ampelopsis All countries All propagules except seeds All countries except Canada, Colombia, Costa Antirrhinum Rica, France, Guatemala, Indonesia, Israel, Netherlands All propagules except seeds Apium All countries except Canada All propagules except seeds Catharanthus All countries except Costa Rica, Guatemala, India, Japan All propagules except seeds Cestrum All countries except Canada All propagules except seeds Convolvulus All countries except Costa Rica, Israel, Kenya, Mexico, Uganda All propagules except seeds Diospyros All countries All propagules except seeds Dysphania All countries All propagules except seeds Garcinia All countries except Thailand All propagules except seeds Jasminum All countries except Canada All propagules except seeds Ligustrum All countries except Canada All propagules except seeds Plantago All countries All propagules except seeds Strongylodon All countries All propagules except seeds All countries except Brazil, Canada, Colombia, Costa Rica, Dominican Republic, El Salvador, Vinca Ethiopia, Guatemala, Israel, Japan, Kenya, Mexico, Netherlands All propagules except seeds Chickpea chlorotic dwarf virus, CpCDV (Mastrevirus, Geminiviridae) and other quarantine pests Beta All countries All propagules except seeds Datura All countries All propagules except seeds Xanthium All countries All propagules except seeds Elm mottle virus, EMoV (Ilavirus, Bromoviridae) and other quarantine pests Philadelphus All countries All propagules except seeds Syringa All countries except Canada All propagules except seeds This exemption is not valid anymore pursuant to Federal Order DA-2021-11, May 26, 2021, Euonymus yellow mottle associated virus which prohibits entry of Euonymus spp. from EuYMaV (Potexvirus, Alphaflexiviridae) Canada. and other quarantine pests Euonymus All countries except Canada All propagules except seeds Hop stunt viroid, HSVd (Hostuviroid, Pospiviroidae) and other quarantine pests Cucumis All countries except Canada and Netherlands All propagules except seeds Galinsoga All countries All propagules except seeds All countries except Canada, Dominican Gynura Republic, Guatemala All propagules except seeds Humulus All countries All propagules except seeds Pistacia All countries All propagules except seeds Myrtaspis syzygii (Diaspididae) and other quarantine pests Syzygium All countries All propagules except seeds Neopestalotiopsis macadamiae (Amphisphaeriaceae) and other quarantine pests Macadamia All countries All propagules except seeds Peronophythora litchii (Peronosporaceae) Dimocarpus and other quarantine pests (syn: Euphoria) All countries All propagules except seeds Phakopsora phyllanthi (Pucciniomycetes, Phakopsoraceae) and other quarantine pests Phyllanthus All countries All propagules except seeds Phomopsis durionis (Diaporthaceae) and Durio All countries other quarantine pests All propagules except seeds Pachira All countries except Canada, China, Costa Rica, Indonesia, Taiwan, Vietnam All propagules except seeds Pseudocercospora ceratoniae (Mycosphaerellaceae) and other quarantine pests Ceratonia All countries All propagules except seeds Pseudocercospora pistacina (syn: Septoria pistacina) (Mycosphaerellaceae) and other quarantine pests Pistacia All countries All propagules except seeds Sirosporium carissae (Mycosphaerellaceae) and other qurantine pests Carissa All countries All propagules except seeds Tomato leaf curl New Delhi virus ToLCNDV (Begomovirus, Geminiviridae) and other quarantine pests Benincasa All countries All propagules except seeds Carica All countries All propagules except seeds Cucumis All countries except Canada and Netherlands All propagules except seeds Cucurbita All countries except Canada All propagules except seeds Datura All countries All propagules except seeds Daucus All countries All propagules except seeds Eclipta All countries All propagules except seeds Lagenaria All countries All propagules except seeds Luffa All countries All propagules except seeds Momordica All countries All propagules except seeds Uredo artocarpi (Pucciniaceae) and other quarantine pests Artocarpus All countries All propagules except seeds .
Recommended publications
  • Pre-Infection Stages of Austropuccinia Psidii in the Epidermis of Eucalyptus Hybrid Leaves with Different Resistance Levels
    Article Pre-Infection Stages of Austropuccinia psidii in the Epidermis of Eucalyptus Hybrid Leaves with Different Resistance Levels Renata Ruiz Silva-Souza 1, André Costa da Silva 2, Roberto Antônio Rodella 3, José Eduardo Serrão 4, José Cola Zanuncio 5 and Edson Luiz Furtado 1,* 1 Departamento de Produção Vegetal, Faculdade de Ciências Agronômicas–UNESP, Botucatu 18610-307, São Paulo, Brasil; [email protected] 2 Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, Minas Gerais, Brasil; [email protected] 3 Departamento de Botânica, Instituto de Biociências de Botucatu–UNESP, Botucatu 18618-000, São Paulo, Brasil; [email protected] 4 Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa 36570-900, Minas Gerais, Brasil; [email protected] 5 Departamento de Entomologia/BIOAGRO, Universidade Federal de Viçosa, Viçosa 36570-900, Minas Gerais, Brasil; [email protected] * Correspondence: [email protected]; Tel.: +55-31-3899-2924 Received: 25 July 2017; Accepted: 20 September 2017; Published: 25 September 2017 Abstract: Rust is a major Eucalyptus spp. disease, which is especially damaging for early-stage plants. The aim of this study was to verify the pre-infection process of Austropuccinia psidii (A. psidii) in the leaves of three phenological stages of Eucalyptus clones with different resistance levels. Plants from the hybrids of Eucalyptus urophylla × Eucalyptus grandis (E. grandis) with variable levels of resistance to this disease were used. The pathogen was inoculated in vitro on abaxial leaf discs of first, third, and fifth leaf stages and maintained under conditions suitable for disease development. Subsequently, samples from these discs were collected 24 and 120 h after inoculation and processed using scanning electron microscopy analysis.
    [Show full text]
  • Austropuccinia Psidii
    This diagnostic protocol was adopted by the Standards Committee on behalf of the Commission on Phytosanitary Measures in August 2018. The annex is a prescriptive part of ISPM 27. ISPM 27 Diagnostic protocols for regulated pests DP 26: Austropuccinia psidii Adopted 2018; published 2018 CONTENTS 1. Pest Information ...............................................................................................................................2 2. Taxonomic Information ....................................................................................................................2 3. Detection ...........................................................................................................................................4 3.1 Signs and symptoms of infection ......................................................................................4 3.2 Sampling and sample preparation .....................................................................................5 3.3 Morphological detection ...................................................................................................5 3.4 Molecular detection ...........................................................................................................6 3.4.1 Preparation of plant material .............................................................................................6 3.4.2 Nucleic acid extraction ......................................................................................................6 3.4.3 Conventional PCR and sequencing ...................................................................................7
    [Show full text]
  • Biosecurity VOLUME 5/2020
    PERSPECTIVES IN Biosecurity VOLUME 5/2020 Ecological communities of tree species threatened by myrtle rust (Austropuccinia psidii (G. Winter) Beenken): The lichenised mycobiota of pōhutukawa (Metrosideros excelsa Sol. ex Gaertn., Myrtaceae) Dan J. Blanchon, Dhahara Ranatunga, Andrew J. Marshall, Peter J. de Lange Ecological communities of tree species threatened by myrtle rust (Austropuccinia psidii (G. Winter) Beenken): The lichenised mycobiota of pōhutukawa (Metrosideros excelsa Sol. ex Gaertn., Myrtaceae), by Dan J. Blanchon, Dhahara Ranatunga, Andrew J. Marshall, Peter J. de Lange, is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. This publication may be cited as: Blanchon, D. J., Ranatunga, D., Marshall, A. J., de Lange, P. J. (2020). Ecological communities of tree species threatened by myrtle rust (Austropuccinia psidii (G. Winter) Beenken): The lichenised mycobiota of pōhutukawa (Metrosideros excelsa Sol. ex Gaertn., Myrtaceae), Perspectives in Biosecurity, 5, 23–44. Contact: [email protected] www.unitec.ac.nz/epress/ Unitec Institute of Technology Private Bag 92025, Victoria Street West Auckland 1142 New Zealand ISSN 2538-0125 Ecological communities of tree species threatened by myrtle rust (Austropuccinia psidii (G. Winter) Beenken): The lichenised mycobiota of pōhutukawa (Metrosideros excelsa Sol. ex Gaertn., Myrtaceae) Dan J. Blanchon (corresponding author, [email protected]), Dhahara Ranatunga, Andrew J. Marshall, Peter J. de Lange Abstract Myrtle rust (Austropuccinia psidii) poses a serious threat to the New Zealand Myrtaceae. While the threat to the host tree is reasonably well-known, the threat myrtle rust poses to the associated biota is poorly understood. As a contribution to our knowledge of this, a preliminary list of the lichenised mycobiota that utilise pōhutukawa (Metrosideros excelsa) as a phorophyte is presented, based on a survey of the specimens in two herbaria with extensive collections from the natural range of this endemic tree species.
    [Show full text]
  • Long Read Assembly of the Pandemic Strain of Austropuccinia Psidii (Myrtle Rust) Reveals an Unusually Large (Gigabase Sized) and Repetitive Fungal Genome
    bioRxiv preprint doi: https://doi.org/10.1101/2020.03.18.996108; this version posted March 20, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-ND 4.0 International license. Long read assembly of the pandemic strain of Austropuccinia psidii (myrtle rust) reveals an unusually large (gigabase sized) and repetitive fungal genome. 1,2Peri A Tobias* ([email protected]), 3Benjamin Schwessinger* ([email protected]), 4Cecilia H Deng ([email protected]), 4Chen Wu ([email protected]), 5Chongmei Dong ([email protected]), 6Jana Sperschneider ([email protected]), 3Ashley Jones ([email protected]), 7Grant R Smith ([email protected]), 8Josquin Tibbits ([email protected]), 9David Chagné ([email protected], 5Robert F Park ([email protected]) * authors for correspondence Affiliations 1 School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW 2006, Australia, 2 Plant & Food Research Australia, Sydney, Australia, 3Australia Research School of Biology, the Australian National University, Acton, ACT 2601, 4The New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland 1142, New Zealand, 5Plant Breeding Institute, University of Sydney. Private Bag 4011 Narellan, NSW 2567, Australia, 6 Biological Data Science Institute, The Australian National University, Canberra, ACT, 2600, Australia, 7The New Zealand Institute for Plant and Food Research Limited, Private Bag 4704, Christchurch Mail Centre, Christchurch 8140, New Zealand, 8Agriculture Victoria 1 bioRxiv preprint doi: https://doi.org/10.1101/2020.03.18.996108; this version posted March 20, 2020.
    [Show full text]
  • Myrtle Rust Reviewed the Impacts of the Invasive Plant Pathogen Austropuccinia Psidii on the Australian Environment R
    Myrtle Rust reviewed The impacts of the invasive plant pathogen Austropuccinia psidii on the Australian environment R. O. Makinson 2018 DRAFT CRCPLANTbiosecurity CRCPLANTbiosecurity © Plant Biosecurity Cooperative Research Centre, 2018 ‘Myrtle Rust reviewed: the impacts of the invasive pathogen Austropuccinia psidii on the Australian environment’ is licenced by the Plant Biosecurity Cooperative Research Centre for use under a Creative Commons Attribution 4.0 Australia licence. For licence conditions see: https://creativecommons.org/licenses/by/4.0/ This Review provides background for the public consultation document ‘Myrtle Rust in Australia – a draft Action Plan’ available at www.apbsf.org.au Author contact details R.O. Makinson1,2 [email protected] 1Bob Makinson Consulting ABN 67 656 298 911 2The Australian Network for Plant Conservation Inc. Cite this publication as: Makinson RO (2018) Myrtle Rust reviewed: the impacts of the invasive pathogen Austropuccinia psidii on the Australian environment. Plant Biosecurity Cooperative Research Centre, Canberra. Front cover: Top: Spotted Gum (Corymbia maculata) infected with Myrtle Rust in glasshouse screening program, Geoff Pegg. Bottom: Melaleuca quinquenervia infected with Myrtle Rust, north-east NSW, Peter Entwistle This project was jointly funded through the Plant Biosecurity Cooperative Research Centre and the Australian Government’s National Environmental Science Program. The Plant Biosecurity CRC is established and supported under the Australian Government Cooperative Research Centres Program. EXECUTIVE SUMMARY This review of the environmental impacts of Myrtle Rust in Australia is accompanied by an adjunct document, Myrtle Rust in Australia – a draft Action Plan. The Action Plan was developed in 2018 in consultation with experts, stakeholders and the public. The intent of the draft Action Plan is to provide a guiding framework for a specifically environmental dimension to Australia’s response to Myrtle Rust – that is, the conservation of native biodiversity at risk.
    [Show full text]
  • 29548 Federal Register / Vol
    29548 Federal Register / Vol. 86, No. 104 / Wednesday, June 2, 2021 / Notices DEPARTMENT OF AGRICULTURE United States. Those regulations and that the only place where plant taxa establish two lists of taxa whose are designated as NAPPRA is in the Animal and Plant Health Inspection importation is NAPPRA: A list of taxa USDA Plants for Planting Manual. The Service of plants for planting that are quarantine commenter suggested that APHIS make [Docket No. APHIS–2018–0066] pests, and a list of taxa of plants for a comprehensive list of all NAPPRA planting that are hosts of quarantine plants, with pests of concern for each, Notice of Decision To Add Taxa of pests. Paragraph (b) of § 319.37–4 so that the reasons why a previously Plants for Planting That Are describes the process for adding plant approved plant can no longer come in Quarantine Pests or Hosts of taxa to the NAPPRA category. are made clear to the public. Quarantine Pests to the Lists of Plants In accordance with that process, on All NAPPRA plants are listed in for Planting Whose Importation Is Not November 25, 2019, we published in the chapter 6 of the USDA Plants for Authorized Pending Pest Risk Analysis Federal Register (84 FR 64825–64826, Planting Manual. The APHIS website Docket No. APHIS–2018–0066) a also lists the NAPPRA weeds and hosts AGENCY: Animal and Plant Health notice 1 that announced our of quarantine pests of Round 1, Round Inspection Service, USDA. determination that 26 taxa of plants for 2, and Round 3.4 A 2018 final rule 5 ACTION: Notice.
    [Show full text]
  • Conservation Assessment of Rhodomyrtus Psidioides (G.Don) Benth (Myrtaceae) Rachael Gallagher, April 2018 NSW Threatened Species Scientific Committee
    NSW Threatened Species Scientific Committee Conservation Assessment of Rhodomyrtus psidioides (G.Don) Benth (Myrtaceae) Rachael Gallagher, April 2018 NSW Threatened Species Scientific Committee Rhodomyrtus psidioides (G.Don) Benth (Myrtaceae) Distribution: NSW, Qld Current EPBC Act Status: Not listed Current NSW BC Act Status: Critically Endangered Summary of Conservation Assessment Rhodomyrtus psidioides was found to be eligible for listing as Critically Endangered under the BC Act 2016 under Clause 4.2 (equivalent to IUCN Criteria A3(e)). To be listed as threatened under Clause 4.2 the species must have experienced a population reduction of 80% (CE threshold) over three generations or 10 years (whichever is longer). The effect of Austropuccinia psidii (Myrtle Rust) infection on Rhodomyrtus psidioides is severe across the species entire range based on quantitative evidence from field surveys. A > 80% reduction in the population of R. psidioides across Australia over the three generations is reasonably expected given documented levels of mortality due to A. psidii infection and high susceptibility to A. psidii in both mature individuals and seedlings. Description and Taxonomy Rhodomyrtus psidioides (G.Don) Benth (family Myrtaceae) is described by PlantNET 2017 as a: “Shrub or small tree to 12 m high with brown scaly bark; young branchlets and inflorescences pubescent with pale hairs. Leaves with lamina narrow-ovate to elliptic or oblong, 5–25 cm long, 2.5–6.5 cm wide, apex shortly acuminate, base cuneate, upper surface glabrous and glossy, lower surface paler; lateral veins conspicuous, intramarginal vein absent; oil glands numerous and conspicuous; petiole 15–20 mm long. Flowers 5-merous, in cymes or raceme-like inflorescences; peduncles 10–25 mm long.
    [Show full text]
  • Metrosideros Excelsa
    Metrosideros excelsa COMMON NAME Pohutukawa SYNONYMS Metrosideros tomentosa Richard FAMILY Myrtaceae AUTHORITY Metrosideros excelsa Sol. ex Gaertn. FLORA CATEGORY Vascular – Native ENDEMIC TAXON Yes ENDEMIC GENUS A Pohutukawa flower. Photographer: DoC No ENDEMIC FAMILY No STRUCTURAL CLASS Trees & Shrubs - Dicotyledons NVS CODE METEXC CHROMOSOME NUMBER Pohutukawa flower. Photographer: DoC 2n = 22 CURRENT CONSERVATION STATUS 2018 | Threatened – Nationally Vulnerable PREVIOUS CONSERVATION STATUSES 2012 | Not Threatened 2009 | Not Threatened 2004 | Not Threatened BRIEF DESCRIPTION Large sprawling mainly coastal tree with leathery oval leaves, bearing masses of red bristly flowers over Christmas. Naturally occurring north of Poverty Bay and north Taranaki, but can be now found as far south as Dunedin. Branches sprawling up to around 20 metres, often with masses of dangling reddish rootlets. DISTRIBUTION Endemic. New Zealand: Three Kings Islands and North Island from North Cape to about Pukearuhe, (northern Taranaki) in the west and near Mahia Peninsula (in the east). However, exact southern limit is difficult to ascertain as it has been widely planted and there is evidence that old time Maori cultivated the tree in some southerly areas. Found inland around the Rotorua Lakes and at Lake Taupo - though these occurrences could stem from Maori plantings (though the association of other normally coastal species around these lakes argues against this). Now widely planted throughout the rest of New Zealand (especially around Nelson, the Marlborough
    [Show full text]
  • <I>Austropuccinia Psidii</I>
    ISPM 27 27 ANNEX 26 ENG DP 26: Austropuccinia psidii INTERNATIONAL STANDARD FOR PHYTOSANITARY MEASURES PHYTOSANITARY FOR STANDARD INTERNATIONAL DIAGNOSTIC PROTOCOLS Produced by the Secretariat of the International Plant Protection Convention (IPPC) This page is intentionally left blank This diagnostic protocol was adopted by the Standards Committee on behalf of the Commission on Phytosanitary Measures in August 2018. The annex is a prescriptive part of ISPM 27. ISPM 27 Diagnostic protocols for regulated pests DP 26: Austropuccinia psidii Adopted 2018; published 2018 CONTENTS 1. Pest Information ...............................................................................................................................2 2. Taxonomic Information ....................................................................................................................2 3. Detection ...........................................................................................................................................4 3.1 Signs and symptoms of infection ......................................................................................4 3.2 Sampling and sample preparation .....................................................................................5 3.3 Morphological detection ...................................................................................................5 3.4 Molecular detection ...........................................................................................................6 3.4.1 Preparation of plant
    [Show full text]
  • A New, Highly Aggressive Race of Austropuccinia Psidii Infects a Widely Planted, Myrtle Rust-­Resistant, Eucalypt Genotype in Brazil
    Received: 19 November 2020 | Revised: 25 January 2021 | Accepted: 10 February 2021 DOI: 10.1111/efp.12679 ORIGINAL ARTICLE A new, highly aggressive race of Austropuccinia psidii infects a widely planted, myrtle rust- resistant, eucalypt genotype in Brazil Rosiane F. Almeida1 | Patrícia S. Machado1 | Michelle B. Damacena1 | Samuel A. Santos1 | Lúcio M.S. Guimarães1,2 | Ned B. Klopfenstein3 | Acelino C. Alfenas1 1Laboratory of Forest Pathology, Department of Plant Pathology, Abstract Universidade Federal de Viçosa, Viçosa, Myrtle rust (MR) caused by Austropuccinia psidii is one of the most important diseases MG, Brazil 2Clonar Resistência a Doenças Florestais, affecting eucalypt (Eucalyptus) plantations in Brazil. Over the years, selection and Zona Rural, Cajuri, MG, Brazil planting of MR- resistant clones has been the primary strategy for MR management. 3 USDA Forest Service, Rocky Mountain In May 2013, young trees of the GG100 hybrid (E. grandis × E. urophylla) clone— widely Research Station, Moscow, ID, USA planted in Brazil and previously classified as resistant to MR— were infected by A. Correspondence psidii in Minas Gerais, Brazil. In this study, artificial inoculations of a eucalypt clone Acelino C. Alfenas, Department of Plant Pathology, Instituto de Biotecnologia set with differential reactions to A. psidii races were used to discover a new race of A. Aplicada à agropecuária- BIOAGRO, psidii (race 5) that was highly aggressive on the majority of eucalypt clones tested. In Universidade Federal de Viçosa, Av. P.H. Rolfs s/n, Campus Universitário, 36570- addition, only this new race successfully infected eucalypt G26 and 847 genotypes, 900 Viçosa, MG, Brazil. which were formerly classified as resistant to the four previously known races of A.
    [Show full text]
  • Austropuccinia Psidii on the Move: Survey Based Insights to Its Geographical Distribution, Host Species, Impacts and Management in Australia
    Biol Invasions (2019) 21:1215–1225 https://doi.org/10.1007/s10530-018-1891-0 (0123456789().,-volV)(0123456789().,-volV) ORIGINAL PAPER Austropuccinia psidii on the move: survey based insights to its geographical distribution, host species, impacts and management in Australia Laura Fernandez Winzer . Katherine A. Berthon . Angus J. Carnegie . Geoff S. Pegg . Michelle R. Leishman Received: 23 July 2018 / Accepted: 27 November 2018 / Published online: 4 December 2018 Ó Springer Nature Switzerland AG 2018 Abstract Austropuccinia psidii is a plant fungus Myrtaceae species remains unknown, with no system- native to South and Central America which causes atic surveillance or monitoring program in Australia. myrtle rust disease, affecting the growth and repro- In order to better understand the extent of A. psidii duction of species in the Myrtaceae family. Austrop- geographic distribution and impacts on Australian uccinia psidii was first detected in Australia 8 years landscapes, a survey was sent to national park, ago in New South Wales. Since then it has spread botanical garden, local council, nursery and forestry rapidly along the east coast, and to date is known to agency employees in all states and territories where infect more than 375 native Myrtaceae species in the disease is known to be present. More than 500 Australia. Despite this, its rapid spread is not well surveys were sent, and 254 responses were received. documented and the potential threat to additional The survey confirms that A. psidii is widespread in New South Wales and Queensland urban environ- ments as well as in native vegetation communities. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10530-018-1891-0) con- Four new host species were confirmed, as well as four tains supplementary material, which is available to authorized new local government areas in two different states users.
    [Show full text]
  • Rapid Field Assessments of Impacts of Plant Fungal Pathogen Austropuccinia Psidii on Five High Priority Myrtaceae Species in New South Wales, Australia
    Cunninghamia Date of Publication: March 2019 A journal of plant ecology for eastern Australia ISSN 0727- 9620 (print) • ISSN 2200 - 405X (Online) Rapid field assessments of impacts of plant fungal pathogen Austropuccinia psidii on five high priority Myrtaceae species in New South Wales, Australia Anthony Manea1*, Laura Fernandez Winzer1 and Michelle R. Leishman1 1Department of Biological Sciences, Macquarie University, North Ryde, NSW 2109, AUSTRALIA *Corresponding author: [email protected] Abstract: In 2010, the plant fungal pathogen Austropuccinia psidii was detected in Australia. It has since spread rapidly through the eastern states of Australia causing significant population declines in a number of susceptible species. However, there are still a number of potentially vulnerable species that lack the necessary field observations that are needed to accurately gauge the risk Austropuccinia psidii poses to them. Because of this, rapid field assessments of these species have been given the utmost priority. In the spring of 2018 (October) we carried out rapid field assessments for five high priority species. We did not observe active Austropuccinia psidii infection on any of the species at the time of assessment despite the majority of individuals having susceptible new flush. However, we did find evidence of significant previous infection (branch dieback) in the largest Archirhodomyrtus beckleri population we assessed. Therefore, to confirm our observations, it is necessary to re-assess this population when environmental conditions
    [Show full text]