Trap Counts

The Williams County Vector Control District uses Carbon Dioxide (CO2) traps. CO2 traps are operated on a weekly to a twice-weekly basis for the purpose of collecting insects for viral testing and enhancing existing surveillance operations.

Since mosquitoes are highly mobile insects and can have a high variability in day-to-day trap collections, spray decisions are often made holistically taking into consideration the mosquitoes behaviors and hypothetical flight ranges. Therefore, management decisions are often not made based on the collections from one single trap over a single night, but are based on a number of traps within an area, often over a period of time. Due to cost and logistical reasons, traps are not placed into every single neighborhood. Exact trap locations are not provided to reduce the potential for theft and vandalism. Additionally, local habitats can drastically change the local abundance of adult mosquitoes.

Treatment blocks are only used as a guide for coordinating mosquito management operations. Borders are arbitrary and are based upon convenient geographic boundaries.

It is beneficial to perform mosquito management operations before mosquito populations reach their peak. Treatments that take place before peak often result in fewer treatments over the duration of a mosquito season.