Regular surveillance of both immature and adult mosquitoes is important because it provides us with information that is crucial to an effective control program. Our surveillance program determines where, when, how many, and which species of mosquito we are likely to encounter.

We routinely conduct larval surveillance within the City of Albany boundaries. This is accomplished with a dipper, a plastic cup attached to the end of a thin pole. Larval breeding areas are sampled by dipping the cup into the water and inspecting it for mosquito larvae. Inspections are performed on several types of sources, including marshes, ditches, creeks, canals, catch basins, neglected fish ponds or hot tubs.

For adult mosquitoes, a specialized trap called an EVS (encephalitis vector surveillance) trap is used. These battery powered devices use dry ice (frozen carbon dioxide) as an attractant, and operate a fan that collects live adult mosquitoes into a bag. The District currently has 11 regular locations throughout Albany where adult surveillance occurs. Each location is trapped every two weeks, from March through October. The most commonly encountered mosquito species in Albany are Culiseta incidens, Culex tarsalis, and Culex pipiens.

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Surveillance and Control

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