Provided by Oregon Department of Forestry
Yellow represents patches of Douglas-fir forest with moderate symptoms of Swiss needle cast (obvious yellow foliage discoloration)
Red represents of patches of Douglas-fir forest with severe symptoms of Swiss needle cast (yellow to brown foliage discoloration and sparse crowns)
2015 results (pdf) | 2014 results (pdf) - pictures (pdf) | 2013 Results (pdf) | 2010 Results
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College of Forestry
Oregon State University
Corvallis, OR 97331-5704
Phone: 541-737-2004
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