Benton County Mosquito Control will be using an airplane to spray areas of Richland, West Richland, Grandview and Mabton for adult mosquitoes Monday.
Spraying will begin at sunset or later and take a couple of hours to complete.
In the Tri-Cities areas to be sprayed include W.E. Johnson Park, along part of Keene Road and northeast to the Yakima River, Leslie Canyon, Yakima River Deltas and surrounding areas
Riverside Drive and nearby areas will be sprayed in West Richland.
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More information on chemicals used in the spray may be found at www.mosquitocontrol.org/adulticiding.
Mosquitoes carrying West Nile virus have been found in Yakima and Umatilla counties so far this year.