The PA Department of Environmental Protection’s West Nile Virus control program will conduct an Ultra Low Volume (ULV) mosquito adulticide spray in portions of Aston Township, Brookhaven Borough, Chester Heights Borough, Chester Township and Upland Borough in Delaware County.  Residential and recreational areas within this treatment area will be sprayed to control adult mosquitoes.  This is a result of high trap counts and the identification of positive mosquito pools in the area.

Operations will take place in the evening hours of Thursday, September 19, 2013 provided that weather and environmental conditions remain suitable for the operation.  If weather conditions or other unexpected events cancel or delay this spray operation, then a rain date is scheduled for the following night.  The PA Department of Environmental Protection will perform the work using truck mounted spraying equipment with the business license BU2626 visible on the equipment.  The product used will be Duet applied at a rate of 1.23 ounces per acre.  This product is designed to provide quick knockdown and effective control of adult mosquitoes.  Treatment will commence at approximately 20:00 and conclude by 23:00 hours.

The below links have more information about the spraying: