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BRANCH CANKER (Occurs frequently) Diamond shaped or elliptical cankers develop on the branches. Large amounts of resin exude from cankers. (The whitish cast is dried resin) Photo by Plant Disease Clinic |
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DIEBACK OR DROUGHT-LIKE SYMPTOMS (Occurs frequently) Dieback of individual branches in the crown. Photo by Chad Behrendt |
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TIP BLIGHT (Occurs infrequently) Shoot death and needle loss occur on the ends of random branches. Dead shoots may curl downward. Photo by Department of Plant Pathology |
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ABNORMAL GROWTH (WITCHES' BROOM) (Occurs infrequently) Abnormal branch growth causes the formation of witches' brooms. Small, brown parasitic seed plants, resembling enlarged buds, form on the branches. Photo by Crystal Floyd |
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OTHER CAUSES Other symptoms caused by chemical, animal, or environmental factors. Photo by Department of Plant Pathology |