File:1963. Laboratory facilities for culturing Bt were set up in a motel. Clarence G. Thompson pictured. Long Beach, WA. (34743854145).jpg

Laboratory facilities for culturing Bacillus thuringiensis (Bt) for viable spore counts were set up in a motel. A pressure cooker was used for sterilization. Clarence G. Thompson is pictured. Long Beach, Washington.

Photo by: Wally C. Guy Date: July 19, 1963

Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Portland Station Collection; La Grande, Oregon Image: PS-2818

For additional information see: <a href="https://archive.org/details/CAT92272778" rel="nofollow">archive.org/details/CAT92272778</a> Carolin, V.M. and C.G. Thompson. 1967. Field testing Bacillus thuringiensis for control of western hemlock looper. Research Paper PNW-38. Portland, OR: USDA Forest Service, Pacific Northwest Forest and Range Experiment Station. 26 p.

For additional historic forest entomology photos, stories, and resources see the Western Forest Insect Work Conference site: <a href="http://wfiwc.org/content/history-and-resources" rel="nofollow">wfiwc.org/content/history-and-resources</a>

Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: <a href="http://www.fs.usda.gov/main/r6/forest-grasslandhealth" rel="nofollow">www.fs.usda.gov/main/r6/forest-grasslandhealth</a>

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