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USDA Forest Service

USDA Forest Service

The U.S. Department of Agriculture Forest Service is a Federal agency that manages public lands in national forests and grasslands. The Forest Service is also the largest forestry research organization in the world, and provides technical and financial assistance to state and private forestry agencies. Gifford Pinchot, the first Chief of the Forest Service, summed up the purpose of the Forest Service—"to provide the greatest amount of good for the greatest amount of people in the long run."
Remove Filters: Diaporthales(X) Stem Decays and Cankers(X) Joseph O'Brien(X) 4 Sizes Available(X)
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Image Subject Name Scientific Name Description
5055024 Leucostoma canker of spruce Leucostoma kunzei Branch mortality in blue spruce caused by Leucostoma canker
5038034 Leucostoma canker of spruce Leucostoma kunzei Resin flow over branch canker.
5037099 Leucostoma canker of spruce Leucostoma kunzei Resin flow on spruce branch caused by Cytospora canker, caused by Leucostoma kunzei.
5030032 Cytospora canker of spruce Valsa kunzei Cankers on the lower branches of a blue spruce.
5038032 Cytospora cankers Cytospora spp.
5038033 Cytospora cankers Cytospora spp.
5037098 Cytospora cankers Cytospora spp. dead branches from cytospora canker

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