CANYON COUNTY MOSQUITO ABATEMENT DISTRICT 9719 Booker Lane Nampa, Idaho 83686

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1 1 CANYON COUNTY MOSQUITO ABATEMENT DISTRICT 9719 Booker Lane Nampa, Idaho Establish Phone (208) Cellular- (208) Fax (208) Members: IMVCA, ECA of Idaho, NWMVCA, AMCA, NPMA 2009 Annual Report Submitted to the Canyon County Board of Commissioners Authority: Idaho Mosquito and Vermin Abatement Act of 2007 Idaho Code Title 39 Health and Safety, Chapter 28. The year 2009 constitutes the eleventh operational and tenth tax funded year for the Canyon County Mosquito Abatement District (CCMAD). The primary emphasis of CCMAD is to abate and manage mosquito populations within the District boundaries. This past year was the first year of county wide mosquito abatement activity and provided many operational challenges. Estimating staffing requirements. Allocation of personnel and equipment Estimation of pesticide supplies and costs. Dealing with in some cases a relatively unchecked mosquito population. Finding and treating mosquito production sites. Educating the public on mosquito control operations to be performed. These were just a few of the challenges that CCMAD encountered in CCMAD is divided into the following control sectors for control and mosquito population surveillance purposes. Lake Lowell Sector: This constitutes areas around the South side, East Side and North side of Lake Lowell adjacent to the Deer Flat National Wildlife Refuge. This sector also encompasses city limits of Nampa south of Greenhurst Road and West of South Powerline Road. To the North to Ustick Road.

2 2 Nampa Sector: City limits of Nampa. The main sources of mosquitoes are concentrated on the East end of the City and ends at McDermott Road/Ada County Line. To the north to Boise River south of Middleton and Star. Caldwell Sector: The City Limits of Caldwell. There are several main sources for mosquitoes for this sector. Boise River area, Simplot Potato Processing Plant area and the Canyon Hill area. To the East to Middleton city limits. Melba/Snake River South: Starts at Bowmont Road to the Snake River along Map Rock Road to the west to Celebration Park to the east. Snake River West: From Sunnyslope area to Marsing Bridge. North to Ustick Road and Homedale city limits. Wilder Sector: The Wilder Sector includes Arena Valley area to the West, the City of Wilder to River Bend Golf Course and Homedale city limits. Greenleaf Sector: Ustick Road to the south. Howe Road/Allendale Road to the North. Includes the city of Greenleaf and along Simplot Blvd. to Simplot potato processing plant to the east. Notus/Boise River Road Sector: From Howe Road to the North to Boise River Road. To the East to Dixie River Road. To the West along Boise River to Highway 95. Notus North Sector: Includes city of Notus to the North to Market Road and Payette County Line. Parma Sector: Includes the city of Parma. To the Northwest along Boise River to Sharp lane. To the south through Roswell to Arena Valley. To the north to Klahr Road to Oregon state line. North Canyon Sector: North of Klahr Road to Payette County Line, to Oregon State Line Nyssa Bridge and Apple Valley. To the East of Anderson Corners to Payette County Line. Middleton Sector: City of Middleton to Ada County line. To the North to Willis Road. To the South to Boise River and to the West to I-84. Sand Hollow/Purple Sage Sector: Oasis Road to the North and Payette County line/gem County line. Purple Sage Golf Course and to the West to Stafford Lane. Farmway Village to Highway North Middleton Sector: North of Foothill Road to Gem County Line. East of Cemetery Road to Ada County Line.

3 East Caldwell Sector: West of Middleton Road to Boise River to the North. South to Ustick Road. 3 South Canyon Sector: South of Deerflat Road, West of Powerline Road, South to Bowmont Lane. Dividing up CCMAD mosquito management zones helped in allocating personnel, equipment and chemicals in the control of mosquito populations. Mosquito Surveillance and West Nile Virus: West Nile virus surveillance started the week of May 24. Below is a graph of mosquito surveillance data for West Nile virus Surveillance Data Mosquito Numbers Collected Cx t Cx p Other Totals May 8-Jun 17-Jun 22-Jun 29-Jun 6-Jul 13-Jul 20-Jul 27-Jul 3-Aug 10-Aug 17-Aug 24-Aug 3-Sep Trapping Date, Week of: Legend: Cx t = Western Equine Encephalitis mosquito (Culex tarsalis) WNV vector (pink line) Cx p = Northern House Mosquito (Culex pipiens complex) WNV Vector (light blue line) Other species: including flood water mosquito, irrigated pasture mosquito, Western malaria mosquito.

4 West Nile Virus vector species started declining week of August 17 and surveillance ended the week of September 3. Included with this report is a chart of mosquito surveillance by trap night. 4 Map of Canyon County surveillance trap deployment:

5 Summary of Canyon County West Nile Virus activity in 2009: 5 CCMAD again utilized the R.A.M.P. (Rapid Analysis Measurement Platform) to make instant management decisions on West Nile Virus adulticide treatments and response level changes. RAMP reader testing equipment was provided to CCMAD by the Idaho State Department of Health and Welfare. Canyon County received no grant monies to perform West Nile Virus surveillance or testing this past year. CCMAD purchased its own testing kits to perform and determine a disease presence. Total number of R.A.M.P. tests performed: 457 tests. Total number of West Nile Virus positive tests: 29 positive tests. Total number of West Nile Virus positive test sites: 18 positive test sites. Table of Positive West Nile Virus Test Sites and Dates Date West Nile Virus Positive Location # of Pos. WNV Test Pools June DFNWR 24 June City of Parma, Water treatment plant 2 positive pool 30 July 9 Caldwell Ponds, Caldwell 2 positive pools July 14 DFNWR 2 positive pools July 21 Ferry Rd/Hill Rd. Melba Hwy 95/Boise River Road, Parma 2 positive pools July 22 DFNWR 2 positive pools July 23 Canyon Hill Cemetery, Caldwell Caldwell Ponds, Caldwell 2 positive pools Aug 5 Simplot Plant, Caldwell Syringa Middle School, Caldwell Caldwell Ponds, Caldwell DFNWR 2 positive pool Aug 6 Aug 13 Aug 19 Parma Sewer Treatment plant Sharp Lane/Boise River, Parma Arena Valley/Peckham Road, Wilder Wilson Springs, IDFG, Nampa City of Middleton, Water Treatment plant City of Notus, city park Arena Valley/Peckham Road, Wilder Center Point High School, Dixie Rd./Red Top Road, Notus. 2 positive pool

6 6 Positive West Nile Virus Test Locations, 2009 Minimum Infection Rate (M.I.R.) In the CCMAD Comprehensive Mosquito Management plan, one of the decision tools that is used to help determine the need to consider emergency aerial adult mosquito control applications. Minimum Infection Rate is a calculated ratio of infected mosquitoes per This ratio calculation is as followed: M.I.R. = # of Positive Mosquito pools x 1000 # of trapped vector species In the CCMAD comprehensive plan, the calculated minimum infection rate of 5 infected mosquitoes/1000 is one of the bench marks considered for instituting aerial adult mosquito control operations. This benchmark ratio is what is recommended for intervention on page 67 of Arbovirus Surveillance and Mosquito Control in Idaho, Guidance for Counties 2 nd Edition. The calculated infection rate in Canyon County never reached the 5/1000 benchmark.

7 7 The following graph tracks the minimum infection rate calculated by CCMAD using CCMAD surveillance data. Calculated Minimum Infection Rate (M.I.R.) M.I.R. Value /22/2009 6/29/2009 7/6/2009 7/13/2009 7/20/2009 7/27/2009 8/3/2009 8/10/2009 8/17/2009 8/24/2009 8/31/2009 Collectionn Date: Week Of: Calculated Minimum Infection Rate from CCMAD Surveillance Data Trapping Date: Week Of: Calculated Minimum Infection Rate June June July July July Aug Aug Aug Aug 24 0 Aug 31 0 Sept 3 0 CCMAD Surveillance ended the week of September 3, Culex (West Nile virus vectors numbers declined).

8 8 Pesticide Use Report for Canyon County Mosquito Abatement District The Pesticide use is divided up by CCMAD Control Zones: Deer Flat National Wildlife Refuge Only Bti (Bacillus thuringiensis israelensis) product compounds are used on mosquito larval production habitat. Ground applications: Total liquid Bti applied: 1,122 diluted gallons on 392 acres. Total granular Bti applied: 351 pounds on 43 acres. Aerial larvicide applications: 14,240 pounds on 2,000 acres. Total acres treated: 2435 acres. Lake Lowell Control Zones (excluding DFNWR) Liquid Bti: 323 diluted gallons on 922 acres. Mosquito Adulticide (U.L.V. neighborhood fogging ): 215 gallons (undiluted, ready to use): 215 gallons on 20,536 acres. (Response to +WNV activity on DFNWR) 2008 comparison: 410 gallons on 35,927 acres. Nampa Control Zones Mosquito Larvae Control Compounds: Total liquid Bti (Bacillus thuringiensis israelensis): 237 diluted gallons on 333 acres. Total Granular Bti: 49 lbs. on 63.8 acres. I.G.R (insect grow regulators) catch basin/retention ponds: Acres treated:.05 acres. IGR Breakdown: Altosid XRG: 5 lbs. Altosid XR: 154 briquettes Altosid 30 day briquettes: 198 briq. Agnique MMF (monomolecular films): 1 acre. Total mosquito production site habitat acres treated: acres Adult Mosquito (U.L.V. neighborhood fogging ) Control Compounds: Bio-Mist 4+4/ Kontrol 4-4 (permithrin base products): 212 gallons (undiluted, ready to use) on 16,596 acres. (1.63 oz. acre) 2008 comparison: gallons on 17,821 acres.

9 Caldwell Control Zones (Caldwell and Caldwell East) 9 Mosquito Larvae Control Compounds: Total liquid Bti: 1,481 diluted gallons on acres. I.G.R. (insect growth regulator) brand name: Altosid: catch basins/irrigation retention ponds: Acres treated: acres. IGR breakdown: Altosid XRG: lbs. Altosid SBG: 296 lbs. Altosid XR: 534 briquettes Altosid XR 30 day: 271 briquettes Agnique MMF (monomolecular films):.065 gal on.0025 acres. Total Mosquito production site habitat acres treated: 834 acres. Adult Mosquito (U.L.V. neighborhood fogging ) Control Compounds: Bio-Mist 4+4/Kontrol 4-4 brand names (permithrin base products): 231 gallons used on 19,543 acres comparison: gallons on acres. Middleton and Middleton North Control Zones Mosquito Larvae Control Compounds: Total liquid Bti: diluted gallons on acres. I.G.R. (Insect growth regulators) brand name: Altosid. Catch basin/irrigation ponds: Acres treated: acres IGR breakdown: Altosid XRG: 37.5 lbs. Altosid SBG: 5 lbs. Altosid XR briquettes: 806 briq. Agnique MMF (monomolecular films):.101 gal. Total mosquito production habitat acres treated: acres. Adult Mosquito (U.L.V. neighborhood fogging ) Control Compounds: Bio-Mist 4+4/Kontrol 4-4 brand names (permithrin base products): gallons on 14, acres comparison: 99.1 gallons on acres. Parma Control Zones including North Canyon Zone Mosquito Larval Control Compounds: Total liquid Bti: 1, gallons on acres. I.G.R. (Insect growth regulators) brand name: Altosid: Catch basin/irrigation ponds/tail ditches: Acres treated: Altosid XR-G: 50 lbs. Altosid SBG: 106 lbs.

10 Parma Control cont 10 Total mosquito production habitat acres treated: 690 acres. Adult Mosquito (U.L.V. fogging ) Control Compounds: gallons on 9,512 acres 2008 comparison: 56.3 gallons on acres Notus and North Notus Control Zones Mosquito Larval Control Compounds: Total Liquid Bti: 1,750.2 gallons on acres. Total granular Bti: 79 pounds on 10.8 acres. I.G.R.: acres Altosid XR-G: 130 lbs. Altosid XR Briquettes: 19 briquettes Total mosquito habitat production acres treated: Adult Mosquito (U.L.V. fogging ) Control Compounds: 254 gallons on 19, acres 2008 comparison: gallons on acres. Melba/Snake River South Control Zones Mosquito Larval Control Compounds: Total liquid Bti: gallons on acres. Total granular Bti: 64 lbs on 9.25 acres. Total I.G.R.:.02 acres. Agnique (M.M.F.):.0357 gal on.0002 acres. Total mosquito habitat production area: Adult Mosquito (U.L.V. fogging ) Control Compounds: gallons on 6519 acres 2008 comparison: 59.6 gallons on acres. Greenleaf Control Zones No larvicide applications made. Adult Mosquito (U.L.V. fogging ) Control Compounds: gallons on acres. No comparable data in Wilder/Arena Valley Control Zones No larvicide applications made.

11 Wilder/Arena Valley cont 11 Adult Mosquito (U.L.V. fogging ) Control Compounds: gallons on 3, acres. No comparable data for Barrier Treatment Operations: CCMAD conducted Barrier Treatment Operations through out the mosquito season. Barrier treatments are performed on individual constituents properties for a number of reasons: Adjacent to sensitive areas or no spray areas where the possibility of pesticide drift may occur. Close proximity to active honey bee colonies. Adjacent to crop areas not registered for mosquito control products such as pasture grass, hops, mint and certain row crops. Properties that are bordering certified organic growers. Summary of CCMAD Barrier Treatment Operations Month Acres treated Gallons Used May June ,725 July ,747.5 Aug ,208.5 Sept ,285.0 Total ,781 Product Used for Barrier Treatments: Talstar or Bifen T/I with the active ingredient Bifenthrin. Rate of Application for Bifenthrin for barrier mosquito control: 16 oz. of Bifenthrin/100 gallons of water applied with power spray equipment calibrated at 50 gallons/acre. The rate of application varies with weather conditions and property mosquito harborage density. Total amount of Bifen T/I (Bifenthrin) concentrate used: 15.9 gallons Pesticide Use Summary: Mosquito Larval Control Products: Vectobac CG granular Bti( ground and aerial): 14,783 pounds Vectobac 12 AS liquid Bti: 6, diluted gallons (282.1 gallons concentrate) Altosid XR briquettes (insect growth regulator): 1,513 briquettes (6.8 cases) Altosid 30 day briquettes (insect growth regulator): 622 briquettes (2.8 cases) Altosid XRG granular (insect growth regulator): pounds. Altosid SBG granular (insect growth regulator): 407 pounds.

12 12 Pesticide Use Summary cont : Agnique MMF (monomolecular film): 1.68 gallons Mosquito Adulticide Compounds: Bio-Mist 4+4/Kontrol 4-4: 1, gallons (211.8 cases) Barrier Treatment Compounds: Bifenthrin (Bifen T/I): 15.9 gallons concentrate Pesticide Use Cost Analysis: Mosquito Larval Control: $46, Mosquito Adult Control: $37, Mosquito Barrier Treatments: $1, Summary and Conclusion: Adequate, accurate and comprehensive mosquito surveillance is one of the main keys of a successful and sustainable mosquito management program. CCMAD trapping and disease testing increased substantially this year and will continue next year. CCMAD surveillance involved two teams, three nights a week with an average of 20 trap sites per night (60 sites per week). High water levels in Lake Lowell led to increased West Nile virus vector species populations and the first positive West Nile virus on Deer Flat National Wildlife Refuge since West Nile Virus response led to elevated Mosquito Adulticide applications on certain areas of the County with eighteen positive West Nile Virus trapping sites and 29 positive pools. Canyon County reached a Level 4 West Nile Virus response. Tracking and monitoring new mosquito production sites was and continues to be an on going process. The comparison between larvicide treatments and adulticide treatments is not where CCMAD goals are: For 2009: 56% Larvicide chemical use. 44% Adulticide chemical use. Goals for 2010: 60% Larvicide chemical use. 40% Adulticide chemical use.

13 13 With 2010 being the second year of County wide mosquito control operations, this goal should be obtainable. The CCMAD goal is to reach a 70% larvicide chemical use- 30% Adulticide chemical use for sustainable county wide mosquito abatement operations. Respectfully submitted, Ed Burnett, Director of Operations CCMAD Board of Trustees Dr. Dan Wingard Doug Shinn Liz Mamer Lois Marshall Norm Brown