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