Mosquito Control & Other Vectors » Integrated Pest Management
Mosquito Population Surveillance

Adult mosquito population densities and diversity change markedly in response to water availability, temperature, and effectiveness of control. These populations have to be monitored on a weekly basis to determine these changes. We accomplish this by using three different types of traps: the Encephalitis Virus Surveillance trap, Faye trap, and Gravid trap.

Faye Trap
Faye Trap

EVS/Faye Traps
These traps collect host seeking female mosquitoes. Dry ice (~6-8 lbs.) placed within a plastic paint can serves as the attractant for host seeking females. As female mosquitoes approach the carbon dioxide plume (produced by the sublimation of the dry ice), they are drawn into a cage by a down draft fan. This trap will collect all species of mosquitoes; however, those captured are usually young mosquitoes looking for their first bloodmeal. This reduces the probability that the collected mosquitoes will be infected with virus. These traps are placed overnight in registered locations. We currently monitor 66 trap locations.

Gravid Traps
This trap was developed by Reiter in 1983 and collects gravid female mosquitoes seeking a place to lay eggs. The attractant used with this trap is a water and hay infusion. This trap is very beneficial because it collects mostly female that have digested a blood meal and are ready to lay eggs; therefore, they have a greater probability of being infected with viruses. Female mosquitoes laying their eggs are drawn into a cage by a vacuum. This trap is very useful in collecting Cx. pipien mosquitoes, a known vector of WNV. These traps are placed overnight in registered locations. We currently monitor 10 trap locations.