1963. Preparing twigs cut by pole-pruner for counting hemlock looper larvae. Willapa Game Refuge, Naselle, WA. (33901442144)

Twigs cut by pole-pruner from sample trees are laid out on mat preparatory to counting hemlock looper larvae on each twig. 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-2811
For more information about this field test see: <a href="Internet Archive scan CAT92272778" 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" 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" www.fs.usda.gov/main/r6/forest-grasslandhealth</a>



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 ∙ Nederlands ∙ slovenščina ∙ Tiếng Việt ∙ македонски ∙ русский ∙ українська ∙ 日本語 ∙ +/−