Intervention Thresholds

Level 1 (Low) Late Spring early Summer

Thresholds numbers and action

Dip counts greater than 3 will begin treated with appropriate larvicide

Trap counts great then 50 of adult mosquitoes that are potential vectors will begin ULV fogging

Trap counts great then 50 nuisance mosquitoes from any trap site begin inspection and may begin ULV fogging.

Level 2 (Moderate) Trap number over 1000

Thresholds numbers and action

Same as level 1 but also adding the following

When 15 traps counts reach 1000 of vector mosquitoes began air spray

Level 3 (High) Positive WNV, SLE, WEE Test

Thresholds numbers and action

Same as levels 1 and 2 but also adding the following

Air spraying that targets high areas of vector mosquitoes

Target areas with WNV positive pools with multiple trucks and air spray when possible