Dioryctria abietella. Larvae, cocoons, and pupae.

Note: Taxonomy is from 1914 photo catalog documentation. In F.P. Keen's Cone and Seed Insects of Western Forest Trees (USDA Technical Bulletin 1169), this image is Figure 53 on page 149. The caption reads, "Larva, prepupal larva, pupae, and pebble-covered cocoons of Dioryctria abietella from Douglas-fir cones."

Photo by: John E. Patterson Date: September 1914

Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Source: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-1961

To learn more about this photo collection see: Wickman, B.E., Torgersen, T.R. and Furniss, M.M. 2002. Photographic images and history of forest insect investigations on the Pacific Slope, 1903-1953. Part 2. Oregon and Washington. American Entomologist, 48(3), p. 178-185.

For additional historical 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="https://www.fs.usda.gov/main/r6/forest-grasslandhealth" rel="nofollow">www.fs.usda.gov/main/r6/forest-grasslandhealth</a>

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 ∙ +/−