Mosquito Report - July 2022

Following above-normal rainfall amounts in April and May, June saw a significant shift to an abnormally dry pattern with rainfall 27.3% below normal. The last O’Hare brood-hatching major rain was on June 13th. In addition, the temperature pattern has been above normal with several 90-degree days. As a result, the floodwater mosquito (Aedes vexans) population has diminished with only spotty annoyance going into early July. Due to the persistent hot and dry pattern, Culex mosquitoes are expected to increase under stagnant water conditions. Accordingly, Clarke operations will focus on permanent larval development habitats for the control of the northern house mosquito, the WNV disease vector.