Note: "Some of the Douglas-fir tussock moth infested areas in Okanogan County were used for a Forest Service study to evaluate the efficacy of an aerially applied biodegradable formulation of Douglas-fir tussock moth mating disruption pheromone. In late July 2009, the pheromone was applied to six 40-acre test plots in infested areas in the Methow Valley, on Palmer Mountain, and east of Oroville, Washington." From the 2009 Western North American Defoliator Working Group meeting notes, available here: www.fs.usda.gov/Internet/FSE_DOCUMENTS/fsbdev2_026316.pdf
Photo by: Iral Ragenovich Date: July 30, 2009
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection. Source: Iral Ragenovich collection.