Adulticiding: Broadcast spraying of pesticides using ULV spraying in attempt to control mosquitoes that spread disease such as West Nile and Zika Virus.
See Parents for a Safer Environment's powerpoint presentation to the Contra Costa County Mosquito & Vector Control District showing the finding:
Harvard University School of Public Health research concluded that broadcast Ultra Light Volume (ULV) spraying of Resmethrin in neighborhood streets, one of the most common protocols used by the mosquito districts, does not effectively reduce the number of mosquitoes that transmit West Nile Virus (WNV).
Aedes aegypti and Aedes albopictus are the species of mosquitoes identified by the Center for Disease Control & Prevention (CDC) that are known to transmit the Zika Virus. West Nile Virus is also transmitted by these same mosquito species as well as by additional ~ 75 additional species according to the CDC. WNV carrying mosquitoes have been tracked & studied for over a decade whereas the Zika virus is not as well understood.
Zika virus is not a project of Parents for a Safer Environment currently, however in the future, we may address the Zika virus if our resources allow. WNV adulticiding has not been revisited since we addressed the issue in 2007 to the Contra Costa County Mosquito & Vector Control District Board of Trustees when they adopted some minimal measures of accountability for staff prior to adulticiding. Due to limited resources and priorities, we have not tracked the District's mosquito adulticiding program in recent years. Improvements were posting of map locations online where spraying is planned to give the community notice and a requirement by staff to show that least toxic options have been attempted prior to spraying more toxic pesticides.