Dave McComb checking collections. European pine shoot moth control. Bellevue, Washington.
Photo by: Unknown Date: September 1961
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection. Source: FHP slide collection; Regional Office; Portland, Oregon.
For more, see: Klein, W.H. and R.M. Thompson. 1962. Procedures and equipment for fumigating European pine shoot moth on ornamental pines. USDA Forest Service, Pacific Northwest Forest and Range Experiment Station. Portland, Oregon. 25 p. archive.org/details/proceduresequipm50klei