1963. Deposit of Thuricide 90-T on salal leaves, resulting from helicopter application on 325 acre experimental area. Field test of Bacillus thuringiensis for western hemlock looper control. Naselle, Washington. (34359143540)

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Description: Deposit of Thuricide 90-T on salal leaves, resulting from helicopter application on 325 acre experimental area. Field test of Bacillus thuringiensis for western hemlock looper control. Naselle, Washington. Photo by: Wally C. Guy and V.M. Carolin 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-2822 For more information about this field test 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 Public domainPublic domainfalsefalse. : This image or file is a work of a United States Department of Agriculture employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain. English | español | 日本語 | македонски | Nederlands | русский | slovenščina | українська | +/− :. Date: 19 July 1963, 11:11. Source: 1963. Deposit of Thuricide 90-T on salal leaves, resulting from helicopter application on 325 acre experimental area. Field test of Bacillus thuringiensis for western hemlock looper control. Naselle, Washington.. Author: R6, State & Private Forestry, Forest Health Protection.