2016. Justin Hof (left) and Bob Schroeter. USFS aerial observers with the ODF Partenavia. Swiss needle cast survey. Salem, Oregon. (35618562645)

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Description: Justin Hof (left) and Bob Schroeter. USFS aerial observers with Oregon Department of Forestry's Partenavia. Swiss needle cast survey. Salem, Oregon. Photo by: Zack Heath Date: May 5, 2016 Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection. Source: Aerial Survey Program collection. For geospatial data collected during annual aerial forest insect and disease detection surveys see: www.fs.usda.gov/detail/r6/forest-grasslandhealth/insects-.. For related historic program documentation see: archive.org/details/AerialForestInsectAndDiseaseDetection.. Johnson, J. 2016. Aerial forest insect and disease detection surveys in Oregon and Washington 1947-2016: The survey. Gen. Tech. Rep. R6-FHP-GTR-0302. Portland, OR: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. 280 p. Image provided by USDA Forest Service, Region 6, 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: 5 May 2016, 17:10. Source: 2016. Justin Hof (left) and Bob Schroeter. USFS aerial observers with the ODF Partenavia. Swiss needle cast survey. Salem, Oregon.. Author: R6, State & Private Forestry, Forest Health Protection.