Vector control Pesticide Use Plan: District Name: Washington County 

 Date: February 18, 2009 

VECTOR CONTROL PESTICIDE USE PLAN 

This is a multi-part form. Page three is a Target Pest Information worksheet that must be filled out for each 

pest for which a treatment is planned during the season. Page four is a Control Agent Worksheet. This 

information must be supplied for each pesticide product or biological control agent that the district intends to 

use. Attach additional sheets as needed. A form containing the specified information in another format may 

be substituted, but please include all information indicated on these forms. 

District Name: Washington County Date:2/18/2009 

Applicator Information 

Name: Kenneth Carver 

Address: 155 N. 1st Ave 

City/Zip: Hillsboro Oregon 97124 

Telephone: 503-846-2904 

E-Mail : kenneth_carver@co.washington.or.us

 

Pesticide Applicator License#: AG-l0178876PPA 

Additional District Information (complete only if there is a contact person who should receive official 

correspondence in addition to pesticide applicator): 

District Contact Name/Title: Toby Harris-Environmental Health Supervisor 

District Address: 155 N. 1st Ave 

District City/Zip: Hillsboro Oregon 97124 

District Phone: 503-846-8722 FAX: 503-846-4490 

PUBLIC NOTIFICATION METHOD (check all that apply): 

Newspaper Television Radio Mailer 

 

Newsletter Bulletin Board Notices Recorded Telephone Message 

 Other: Web Site, educational booths, presentations 

PUBLIC NOTIFICATION INFORMATION (provide a short description of notification plan, i.e., timing, 

frequency, languages other than English, etc.): 

Public will be notified in the spring of mosquito surveillance and control activities planned for the season. 

The public will also be notified of the relevant arbovirus information and control activities through various 

media outlets as needed through the course of the mosquito season. Washington County’s program is a joint 

effort between the County participating Cities, Clean Water Services, Tualatin Hills Park and Recreation 

District, Hillsboro Parks, and Beaverton School District. Public notification of actual pesticide applications 

will be the responsibility of the agency making the applications. 
Vector Control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

TARGET PEST INFORMATION 

IMPORTANT: COMPLETE ONE SHEET FOR EACH TARGET PEST 

Target Pest: Check only one target pest per worksheet. 

Mosquito Larvae Domestic Rat Domestic Fly 

 

Mosquito Adult Other Pest (specify) 

MONITORING METHOD/TREATMENT THRESHOLD 

Monitoring Method: 

Standard 4 oz dipper; mosquito samples will be identified to species and counted. 

Treatment Threshold: 

1 mosquito per dip for mosquito species with high capacity to vector disease, including (but not 

limited to) Culex pipiens, Culex tarsalis, Culex stigmatasoma and Aedes japonicus. 

5 mosquitoes per dip for species with a low capacity to vector disease or cause nuisance/livability 

concerns, including (but not limited to) Aedes vexans, Coquillettidia perturbans, and Culiseta 

inornata 

EFFICACY SAMPLING 

A representative number of sites treated with either a bacterial product or a surface film will be 

sampled 24 to 72 hours post-treatment using standard dippers, the number of mosquitoes per dip will 

be compared with pre-treatment numbers for that site. Instar stages of the larval life cycle will be 

compared with pre-treatment instar stages. 

A representative number of sites treated with an insect growth regulator will be sampled 24 to 72 

hours post-treatment (and every 2 weeks thereafter); pupae samples will be collected and transported 

to the lab alive for rearing to determine if they reach the adult stage in life cycle. 

SURVEILLANCE FOR IMPACTS ON NON-TARGET SPECIES 

Presence or absence of non-target organisms will be noted for both pre- and post-treatment samples. 

Washington County does not have the resources for more in depth evaluations. We will rely on 

published studies of non-target effects to determine larval control strategies. 

TOTAL NUMBER OF AGENTS (PESTICIDES AND BIOLOGICAL CONTROLS) TO BE 

USED FOR CONTROL: Nine 
Vector Control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

TARGET PEST INFORMATION 

IMPORTANT: COMPLETE ONE SHEET FOR EACH TARGET PEST 

Target Pest: Check only one target pest per worksheet. 

Mosquito Larvae Domestic Rat Domestic Fly 

 

Mosquito Adult Other Pest (specify) 

MONITORING METHOD/TREATMENT THRESHOLD 

Monitoring Method: Adult mosquitoes will be monitored using Gravid and CO2 Baited EVS traps 

set at over 80 locations through out Washington County. Other Gravid and CO2 baited EVS traps 

will be placed around the county based on adult mosquito complaints. All mosquitoes collected will 

be counted and identified to species. Pools of selected mosquitoes will be RAMP tested by the 

county and/or sent to the Oregon State University Veterinary Diagnostic Laboratory (OSU VDL) for 

testing if needed. 

Treatment Threshold: The threshold for control of adult mosquitoes will include the presence of 

arbovirus in mosquito populations and an evaluation of public health risk, according to the 

Washington County Health Officer. 

EFFICACY SAMPLING 

If adulticides are used, adult mosquito samples will be collected one night before application is to be 

applied. Those mosquitoes, trapped the night before, will be placed in a cage in the area to be 

treated. After the application is applied to an area of concern, the caged mosquitoes will be taken 

back to Washington County’s Lab to determine the effectiveness of the application. 

SURVEILLANCE FOR IMPACTS ON NON-TARGET SPECIES 

Washington County does not have the resources to monitor the non-target effects of adulticide 

applications; however, we will make every effort to minimize effects on non-target with proper 

application techniques including rate, droplet size and atmospheric conditions, in accordance with 

label recommendations and published literature. 

TOTAL NUMBER OF AGENTS (PESTICIDES AND BIOLOGICAL CONTROLS) TO BE 

USED FOR CONTROL: Four 
Vector Control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

SENSITIVE AREAS AND SPECIES 

(Provide a description of sensitive areas. Map(s) that show sensitive areas, areas to be treated by 

larviciding and areas to be treated by adulticiding should be on file with ODFW. If new sensitive 

areas are identified include new maps with this application.) 

A map of rivers and streams considered sensitive has been submitted with this report. If further 

details or additional copies of the map are needed, please contact Washington County’s 

Environmental Health office. 

EDUCATIONAL ACTIVITIES OF DISTRICT 

(Provide a brief description of educational outreach, including programs for source control in the 

community.) 

Washington County provides and will continue to provide bilingual educational materials. 

Information will be provided to local schools, day cares, senior centers, hospitals, healthcare 

facilities, city resource centers, libraries, feed stores, and kennels by the end of April. Efforts will 

continue through October to provide information to the above locations as needed. The county has 

prepared brochures for public distribution with additional West Nile virus information and contacts 

available at the county web site. Technical staff presentations and educational displays are available 

on request. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Gambusia affins 

EPA REGISTRATION#: N/A 

ACTIVE INGREDIENTS: N/A 

POUNDS OF ACTIVE INGREDIENT TO BE USED: 1000-2000 fish 

ACRES TO BE TREATED: undetermined 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 562 fish 

TARGET PEST: 

Anopheles, Culex, and Culiseta larval mosquitoes. 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

~1000 fish per acre, 0.6 lbs per acre 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Fish are provided to the public for use in aquaria habitats and other manmade containers that are 

not connected to any natural waterways. Washington County holds the proper permit to transport 

fish, and with prior notice, Washington County residents will be able to obtain fish directly from 

the County. 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Various stock ponds, ornamental ponds, and stock troughs owned by Washington County 

residents. Compliance with Oregon law (ORS 498.222) will be followed at all times, which 

allows mosquito fish to be stocked only in “aquaria,” defined as self-contained systems that are 

not fed or drained by natural waterways such as ornamental ponds and stock troughs. ORS 

498.222 states, “Natural waterways include creeks, streams, sloughs, ponds, lakes and ditches if 

connected to natural waterways.” 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Altosid Pellets 

EPA REGISTRATION#: 2724-448 

ACTIVE INGREDIENTS: (S)-Methoprene (CAS #65733-16-6) 

POUNDS OF ACTIVE INGREDIENT TO BE USED: Undetermined 

ACRES TO BE TREATED: Undetermined 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 4 pounds 

TARGET PEST: 

Larval mosquitoes in the genera Aedes, Anopheles, Coquillettidia, Culex, Culiseta, 

Mansonia and Psorophora. 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

Product will be applied at a rate of about 5 pounds per acre as indicated on label. In areas where 

there is a high turn over of water, the application rate may be higher, but will not exceed 10 

pounds per acre. 

APPLICATION METHOD: (Describe the application apparatus, product diluents’, mixture, if 

any, and application process) 

Product will be applied by hand, granule spreader or powered backpacks. 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Altosid Pellets will primarily be applied in artificial containers, storm water detention facilities, 

catch basins, tires, ditches, temporary ponds and permanent ponds. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Altosid Briquets 

EPA REGISTRATION#: 2724-375 

ACTIVE INGREDIENTS: (S)-Methoprene (CAS #65733-16-6) 

POUNDS OF ACTIVE INGREDIENT TO BE USED: Undetermined 

ACRES TO BE TREATED: Undetermined 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: None 

TARGET PEST: 

Larval mosquitoes in the genera Aedes, Anopheles, Coquillettidia, Culex, Culiseta, 

Mansonia and Psorophora. 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

One briquet per 100 square feet (~0.002 acre) 

One briquet per catch basin. Additional briquettes will be used per ten cubic feet of water. 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Hand application 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Altosid Briquettes will primarily be used in artificial containers including sumped catch basins 

and storm water detention facilities throughout Washington County. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Altosid XR Extended Residual Briquets 

EPA REGISTRATION#: 2724-241 

ACTIVE INGREDIENTS: (S)-Methoprene (CAS #65733-16-6) 

POUNDS OF ACTIVE INGREDIENT TO BE USED: ~2096 lbs 

ACRES TO BE TREATED: Approximately 120 acres 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 1760 lbs 

TARGET PEST: 

Larval mosquitoes in the genera Aedes, Anopheles, Coquillettidia, Culex, Culiseta, 

Mansonia and Psorophora. 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

One briquet (0.08 lbs) per catch basin, or one briquet per 200 square feet 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Hand application. 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Product will be applied to sumped catch basins, storm water facilities, and wastewater treatment 

areas. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Vectobac G 

EPA REGISTRATION#: 73049-10 

ACTIVE INGREDIENTS: Bacillus thuringiensis subspecies isrealensis 

POUNDS OF ACTIVE INGREDIENT TO BE USED: ~546 

ACRES TO BE TREATED: 70 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 546 pounds 

TARGET PEST: 

Larval mosquitoes in the genera Culex, Anopheles, Aedes, Culiseta and Coquillettidia. 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

7.5 pounds of product per acre and will not exceed 10 lbs. Per acre as indicated from label 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Vectobac G will be applied by a granule spreader, gas powered backpack blower, or by an aerial 

application if necessary. 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Vectobac G will be used in larger freshwater permanent or temporary sites including wetlands, 

ponds, flood plains, irrigation ditches, roadside ditches, and pastures. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: VectoLex CG 

EPA REGISTRATION#: 73049-20 

ACTIVE INGREDIENTS: Bacillis sphaericus H5a5b, strain 2362 

POUNDS OF ACTIVE INGREDIENT TO BE USED: Undetermined 

ACRES TO BE TREATED: Undetermined 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: Two pounds 

TARGET PEST: 

Larval mosquitoes in the genera Culex, Anopheles, Aedes, Culiseta and Coquillettidia. 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

7.0 – 20 pounds per acre. Higher application rates will be applied to more polluted areas or when 

more residual activity is required. 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Product will be applied by hand-powered spreader or gas powered backpack. 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

VectoLex CG will be used in larger freshwater permanent or temporary sites including wetlands, 

ponds, flood plains, irrigation ditches, roadside ditches, and pastures. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Golden Bear 1111 Mosquito Larvicide 

EPA REGISTRATION#: 8329-72 

ACTIVE INGREDIENTS: Aliphatic Petroleum Hydrocarbons 

POUNDS OF ACTIVE INGREDIENT TO BE USED: Undetermined 

ACRES TO BE TREATED: Undetermined 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: none 

TARGET PEST: 

Mosquito pupae 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

Three gallons per surface acre 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Hand pump sprayer 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Areas where mosquito pupae predominantly exist and are not connected to natural waterways. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Agnique MMF 

EPA REGISTRATION#: 53263-28 

ACTIVE INGREDIENTS: Poly (oxy-1, 2-ethanediyl), alpha-isooctadecyl -hydroxy 

POUNDS OF ACTIVE INGREDIENT TO BE USED: Undetermined 

ACRES TO BE TREATED: Undetermined 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: none 

TARGET PEST: 

Mosquito Pupae 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

0.3 gallons per surface acre 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Hand held or backpack liquid sprayers 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Areas where mosquito pupae predominantly exist and are not connected to natural waterways. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Anvil 10+10 ULV 

EPA REGISTRATION#: 1021-1688-8329 

ACTIVE INGREDIENTS: 3-Phenoxybenzyl-(1RS, 3RS; 1RS, 3SR)-2, 2-dimethyl-3- 

(2-methylprop-1-enyl) cyclopropanecarboxylate. ........................ 10% 

Piperonyl Butoxide. ........................................................... 10% 

POUNDS OF ACTIVE INGREDIENT TO BE USED: Undetermined 

ACRES TO BE TREATED: Undetermined 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: none 

TARGET PEST: 

Adult mosquitoes in the genera Culex, Aedes, Anopheles, Ochlerotatus, Culiseta and 

Coquillettidia. 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

Not to exceed 0.0036 lbs of A.I./acre for ground and aerial applications 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Ground ULV application: 300 ft swath, droplets to be between 5-25 microns, at a speed between 

5-20mph, at a maximum rate of 0.62 fluid ounces per acre. 

Aerial Application: Droplets produced should be 50 microns or below, flow rate and swath will 

be set to achieve 0.21 to 0.62 fluid ounces per acre. 

Product may also be diluted with a mineral oil, and will not exceed 0.62 fluid ounces per acre. 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Anvil 10+10 ULV will be used in areas of adult mosquito and arbovirus activity. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Pyrenone 25-5 Public Health Insecticide 

EPA REGISTRATION#: 432-1050 

ACTIVE INGREDIENTS: Pyrethrins, Piperonyl Butoxide 

POUNDS OF ACTIVE INGREDIENT TO BE USED: Undetermined 

ACRES TO BE TREATED: Undetermined 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: None 

TARGET PEST: 

Adult mosquitoes 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

0.0025 pounds of active ingredient per acre 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Pyrenone 25-5 applications will be made using Ultra Low Volume (ULV) techniques by ground 

and possibly by air. 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Pyrenone 25-5 will be used in areas of adult mosquito and arbovirus activity. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Pyrocide Mosquito Adulticiding Concentrate for ULV Fogging 7396 

EPA REGISTRATION#: 1021-1569 

ACTIVE INGREDIENTS: Pyrethrins, Piperonyl Butoxide 

POUNDS OF ACTIVE INGREDIENT TO BE USED: Undetermined 

ACRES TO BE TREATED: Undetermined 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: None 

TARGET PEST: 

Adult mosquitoes, primarily Culex species. 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

Not to exceed 0.0025 pounds of Pyrethrin and 0.0125 pounds of Piperonyl Butoxide per acre 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Pyrocide applications will be made using Ultra Low Volume (ULV) techniques by ground and 

possibly by air. 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Pyrocide will be used in areas of adult mosquito and arbovirus activity. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Scourge Insecticide with Resmethrin/Piperonyl Butoxide 18% + 54% 

EPA REGISTRATION#: 432-667 

ACTIVE INGREDIENTS: Remethrin and Piperonyl Butoxide 

POUNDS OF ACTIVE INGREDIENT TO BE USED: Undetermined 

ACRES TO BE TREATED: Undetermined 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: None 

TARGET PEST: 

Adult mosquitoes 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

Product to be applied at 0.0035 fluid ounces of active ingredient 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Mixed with either soybean or light mineral oil 

Applied using ground or aerial ULV equipment 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Scourge Insecticide will be used in areas of adult mosquito and arboviral activity. 
Vector control Pesticide Use Plan: District Name: Washington County 

 Date: 2/18/2009 

CONTROL AGENT WORKSHEET 

IMPORTANT: Complete One Worksheet for each Control Agent 

PRODUCT NAME: Altosid Pellets WSP 

EPA REGISTRATION#: 2724-448 

ACTIVE INGREDIENTS: (S)-Methoprene (CAS #65733-16-6) 

POUNDS OF ACTIVE INGREDIENT TO BE USED: Undetermined 

ACRES TO BE TREATED: Undetermined 

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: None 

TARGET PEST: 

Larval mosquitoes in the genera Aedes, Anopheles, Coquillettidia, Culex, Culiseta, 

Mansonia and Psorophora. 

RATE OF APPLICATION: (Give in units of pounds of active ingredient per acre and/or pounds of product 

per acre) 

One pouch per catch basin or One pouch per 135 square feet 

APPLICATION METHOD: (Describe the application apparatus, product diluent, mixture, if 

any, and application process) 

Hand application 

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) 

Small bodies of water such as: 

Catch basins, storm drains, ditches, fountains, ponds, animal watering troughs.