THOMPSON-NICOLA REGIONAL DISTRICT NUISANCE MOSQUITO CONTROL PROGRAM 2011 YEAR-END REPORT Prepared by: ___________________________ Burke Phippen, BSc., RPBio. Project Manager ___________________________ Cheryl Phippen, BSc., RN Field Coordinator NOVEMBER, 2011 BWP CONSULTING INC. 6211 Meadowland C res S, Kamloops, BC V2C 6X3 2011 Thompson-Nicola Regional District Mosquito Control Program Table of Contents LIST OF FIGURES ............................................................................................................... IV LIST OF TABLES .................................................................................................................. V EXECUTIVE SUMMARY ....................................................................................................... 1 1.0 INTRODUCTION ............................................................................................................. 3 1.1. RESOURCES AVAILABLE FOR MOSQUITO CONTROL PROGRAM ................................. 5 2.0 ENVIRONMENTAL FACTORS ......................................................................................... 5 2.1. SNOW PACK .............................................................................................................. 5 2.1. TEMPERATURE AND PRECIPITATION .......................................................................... 7 2.2. FLOW LEVELS ............................................................................................................ 9 3.0 LARVICIDING PROGRAM ............................................................................................ 10 3.1. HAND APPLICATION OF LARVICIDE ......................................................................... 14 3.2. HELICOPTER APPLICATION OF LARVICIDE .............................................................. 14 3.2.1. Snowmelt and Grassland Applications ........................................................... 15 3.2.2. North and South Thompson Floodwater Applications ................................... 15 4.0 ADULTICIDING PROGRAM .......................................................................................... 16 4.1. CALIBRATION OF ULV SPRAYERS ........................................................................... 17 4.2. APPLICATION OF ADULTICIDES ............................................................................... 18 5.0 LIGHT TRAPS .............................................................................................................. 19 5.1. ANALYSIS OF 2011 LIGHT TRAP CATCHES .............................................................. 20 6.0 BIOLOGY OF MAJOR MOSQUITO SPECIES COLLECTED ............................................ 28 6.1. AEDINES IN GENERAL ............................................................................................. 28 6.1.1. Aedes cinereus ................................................................................................ 28 6.1.2. Aedes vexans ................................................................................................... 29 6.1.3. Ochlerotatus dorsalis ...................................................................................... 29 6.1.4. Ochlerotatus excrucians ................................................................................. 30 6.1.5. Ochlerotatus fitchii ......................................................................................... 30 6.1.6. Ochlerotatus implicatus .................................................................................. 30 6.1.7. Ochlerotatus increpitus ................................................................................... 31 6.1.8. Ochlerotatus punctor ...................................................................................... 31 6.1.9. Ochlerotatus sierrensis ................................................................................... 31 BWP Consulting Inc Page ii 2011 Thompson-Nicola Regional District Mosquito Control Program 6.1.10. Ochlerotatus spencerii (both variants).......................................................... 31 6.1.11. Ochlerotatus sticticus.................................................................................... 32 6.2. CULEX SPECIES ........................................................................................................ 32 6.2.1. Culex tarsalis .................................................................................................. 33 6.2.2. Culex pipiens ................................................................................................... 33 6.3. CULISETA SPECIES ................................................................................................... 34 6.3.1. Culiseta alaskaensis ........................................................................................ 34 6.3.2. Culiseta incidens ............................................................................................. 34 6.3.3. Culiseta inornata ............................................................................................ 35 6.3.4. Culiseta minnesotae ........................................................................................ 35 6.3.5. Culiseta morsitans .......................................................................................... 36 6.4. ANOPHELES SPECIES ................................................................................................ 36 6.4.1. Anopheles earlei .............................................................................................. 37 6.4.2. Anopheles freeborni ........................................................................................ 37 6.4.3. Anopheles punctipennis .................................................................................. 37 7.0 MOSQUITO ADVISORY LINE ....................................................................................... 38 8.0 THE KAMLOOPS SPRING AND FALL HOME AND GARDEN SHOWS & TRAVELLING ROAD SHOW ..................................................................................................................... 39 9.0 WEST NILE VIRUS ACTIVITIES .................................................................................. 40 10.0 RECOMMENDATIONS ................................................................................................ 40 REFERENCES ..................................................................................................................... 41 BWP Consulting Inc Page iii 2011 Thompson-Nicola Regional District Mosquito Control Program LIST OF FIGURES Figure 1. Map outlining electoral boundaries and nuisance Mosquito Control Areas within the Thompson-Nicola Regional District. ......................................................... 4 Figure 2. Snow pack at Kostal Lake, in the North Thompson watershed ......................... 6 Figure 3. Snow pack at Park Mountain, in the South Thompson watershed. .................... 7 Figure 4. Minimum and maximum daily temperatures (°C) measured at Environment Canada weather station Blue River CS (1160H99). ................................................... 8 Figure 5. Daily precipitation measured at Environment Canada weather station Blue River CS (1160H99). .................................................................................................. 8 Figure 6. Daily flows for 2011 measured on the North Thompson River (WSC Hydrometric Station #08LB064) at McLure Ferry, BC, compared with flows from previous high-water years. .......................................................................................... 9 Figure 7. Hydrograph of the North Thompson River at McLure showing dates of 2011 helicopter larviciding applications. ........................................................................... 16 BWP Consulting Inc Page iv 2011 Thompson-Nicola Regional District Mosquito Control Program LIST OF TABLES Table 1. Summary of maximum instantaneous discharge for the North Thompson River at McLure between 1998 and 2011. .......................................................................... 10 Table 2. Historic amounts of granular larvicide (Bacillus thuringiensis var israelensis) used in the TNRD. .................................................................................................... 12 Table 3. Application of Bti Larvicides in Mosquito Area South (Kamloops, Chase, Logan Lake, Areas ‘J’, ‘L’, & part of ‘P’. ................................................................ 13 Table 4. Application of Bti Larvicides in Mosquito Area North (Area ‘O’ and part of ‘P’). ........................................................................................................................... 13 Table 5. Application of Bti Larvicides in Electoral Area ‘A’ .......................................... 14 Table 6. Results of calibration activities for adulticiding equipment. ............................. 18 Table 7. Volumes of Malathion and Resmethrin used in the TNRD since 1989. ............ 19 Table 8. Mosquito specimens collected in the New Jersey light trap at the Waste Water Treatment Plant in Kamloops, BC. ........................................................................... 22 Table 9. Mosquito specimens collected in the New Jersey light trap in Noble Creek, BC. ................................................................................................................................... 22 Table 10. Mosquito specimens collected in the New Jersey light trap in McLure, BC. ... 23 Table 11. Mosquito specimens collected in