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BROWNING NEEDLES ON ENTIRE OR OUTER PORTION OF BRANCH (Occurs frequently) Needles brown and eventually drop from the tree, leaving entire branches bare. Photo by U of MN Extension Service |
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NEEDLE CAST, INNER PORTION OF BRANCH (Occurs frequently) Yellowing, browning, then dropping of inner needles on lower branches, leaving green growth at the tips. Photo by Chad J. Behrendt |
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NEEDLE CAST, BRANCH TIPS ONLY (Occurs infrequently) Needles at the branch tips turn brown and drop from the tree. The shoot also dies. Photo by Department of Plant Pathology |
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NEEDLE CAST, BROWN INNER NEEDLES WITH BLACK BANDS (Occurs occasionally) Black, elongate bands occur on inner needles. Infected needles remain attached until weathered off. Photo by Chad Behrendt |
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OTHER CAUSES Other symptoms caused by chemical, animal, or environmental factors. Photo by Chad Behrendt |