UNDATED (KDAL) - Aerial spraying to help control the spread of the gypsy moth will take place in Washburn and Douglas Counties in Wisconsin and in St. Louis County in Minnesota this week. Selected sites in Douglas County including a section of Superior will be treated on Tuesday and possibly Wednesday. Treatments will start on Wednesday around the Lester River, Whiteface Reservoir and Eagles Nest Lake in St. Louis County and continue through Saturday depending on weather conditions. Tiny pheromone flakes will be applied to the targeted areas to try and disrupt the mating patterns of the gypsy moths as the adult moths are emerging at this time of year. The flakes are not toxic to people, plants or animals.