posted by: USDA Forest Service Pacific Northwest Region Forest Health Protection |
Swiss Needle Cast (SNC) Swiss needle cast is a fungus with small fruiting bodies that in large quantities looks like soot on the underside of Douglas-fir needles. In severe cases, the needles become chlorotic (yellow) and fall off prematurely. This slows the growth of the tree and gives it a sparse appearance.
If you believe an area to be at risk of high levels of SNC it is crucial to select local tree sources and to favor alternate species such as hemlock or alder. |
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WADNR Forest Health Home Washington Department of Natural Resources PNW Region Forest Health Protection |