OSU Wasco County Extension Horticulturist Dr. Ashley Thompson says the cherry fruit fly is predicted to emerge on Sunday in The Dalles area.  The entire cherry-growing area, including the cities of The Dalles, Mosier and Dufur are within a cherry fruit fly control district.  Thompson says all homeowners with a backyard tree as well as commercial orchardists are required by state ordinance to apply a control program.  For homeowners, the recommended materials would include Spinosad or Malathion.  To obtain a free pesticide spray guide for this and other tree fruit pests, call the Wasco County Extension Office at 541-296-5494 and leave a message for staff to contact you.