Damage to willow caused by Euura sawflies; petiole and midrib gall. Figure 256-B on page 446 in Furniss and Carolin. 1977. Western Forest Insects. See: <a href="https://archive.org/stream/westernforestins1339furn#page/446/mode/2up" rel="nofollow">archive.org/stream/westernforestins1339furn#page/446/mode...</a>

Note: With no other documentation available, this image was assigned the 1977 Western Forest Insects publishing date.

Photo by: Unknown Date: 1977 (publication date)

Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Portland Station Collection; La Grande, Oregon. Image: PS-5279

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="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 ∙ +/−