D3244: Environmental health benefit of SIT release in Fresno County Cal, 2016-2019

Insecticides (adulticides, larvicides, and insect growth regulators) are commonly used to control mosquito populations. However, insecticides can also negatively affect non-target organisms, such as freshwater fish, honeybees, butterflies, etc. The release of Wolbachia-infected sterile male mosquitoes is an emerging alternative vector control method. When Wolbachia-infected male Aedes aegypti mosquitoes mate with wild female mosquitoes, the female produces non-viable offspring reducing the next generation of Ae. aegypti. The aim of this study is to investigate whether areas with Wolbachia male mosquito releases might have a difference in insecticide use (adulticides, larvicides). In Fresno County, California Wolbachia-infected male Ae. aegypti were released in residential neighborhoods from 2016-2019. Data on mosquito control insecticide use will be compared in non-release and release sites. In addition, volatile organic compound (VOC) emissions associated with insecticide use will be determined. Wolbachia male mosquito releases have been shown to reduce adult Ae. aegypti populations. This study further examines whether traditional mosquito control measures may be reduced in these areas as well. Results and limits of this study will be discussed.