File:1963. Installing charcoal filter in Finn Creek in an attempt to filter out any DDT. Western hemlock looper control project, Washington. (36778912940).jpg

Installing charcoal filter in Finn Creek in an attempt to filter out any DDT. Western hemlock looper control project, Washington.

Photo by: Unknown Date: 1963

Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection. Collection: Region 6, Forest Health Protection slide collection; Regional Office, Portland, Oregon.

For information about this control project see: <a href="https://archive.org/details/CAT10507172" rel="nofollow">archive.org/details/CAT10507172</a> Buffam, P.E. 1963. Plan for the technical direction of the 1963 western hemlock looper control project in southwest Washington. USDA Forest Service, Pacific Northwest Region, Division of Timber Management, Insect and Disease Control Branch. 20 p.

Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: <a href="http://www.fs.usda.gov/main/r6/forest-grasslandhealth" rel="nofollow">www.fs.usda.gov/main/r6/forest-grasslandhealth</a>

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