Controlling Adult Mosquitoes
The City of Grand Forks employs a comprehensive mosquito control program that’s comprised of 5 distinct sectors; surveillance, public education, larviciding, adulticiding, and source reduction. Each sector plays an important role in reducing the risk of mosquito-borne disease and reducing the nuisance level of mosquitoes. While most of our resources are expended in surveillance and larviciding, the adulticiding program is an important component of this program as this provides the direct means to control adult mosquitoes and reduce the risk of mosquito-borne diseases. The pesticides used for adult mosquito control are registered by the EPA for use in residential, municipal, and recreational areas. These products are applied either by aircraft or on the ground employing truck-mounted sprayers. State and local agencies commonly use the organophosphate insecticides malathion and naled and the synthetic pyrethroid insecticides prallethrin, etofenprox, pyrethrins, permethrin, resmethrin and sumithrin for adult mosquito control. The City of Grand Forks primarily uses permethrin and etofenprox when ground spraying.
Mosquito adulticides are applied as ultra-low volume (ULV) sprays. ULV sprayers dispense very fine aerosol droplets that stay aloft and kill flying mosquitoes on contact. ULV applications involve small quantities of pesticide active ingredient in relation to the size of the area treated, typically less than 1.2 ounces per acre.
Adulticides can be used for public health mosquito control programs without posing risks of concern to the general population or to the environment when applied according to the pesticide label.
Adult mosquito control is conducted in Grand Forks when the average daily trap count reaches or exceeds 35 (nuisance) mosquitoes per day. Adult control will also occur when there’s an elevated risk for mosquito-borne disease.
This information provided by the EPA and the Grand Forks Public Health Department-Mosquito Control.