1963. Petri dishes and other glassware are being sterilized in a pressure cooker in field laboratory. C.G. Thompson is pictured. Willapa Game Refuge. Naselle, WA.

Petri dishes and other glassware are being sterilized in a pressure cooker in field laboratory. Clarence G. Thompson is pictured. Willapa Game Refuge. Naselle, 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-2817

 

For additional information see: archive.org/details/CAT92272778

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: wfiwc.org/content/history-and-resources

 

Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth

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