Monday employees will be in Ogle and Winnebago County spraying for gypsy moths. Pheromone flakes will be sprayed in Byron and Castle Rock in Ogle County. In Winnebago County, Cherry Valley will be treated. Airplanes will apply the flakes. The treatment is non-toxic to humans and other mammals, birds, fish and most insects. Gypsy moths feast on foliage of trees and shrubs. The treatment will disrupt the mating of the moth to trees.