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BLACK LEAF SPOTS (Occurs frequently) Black circular leaf spots with feathery margins. Photo by Plant Disease Clinic |
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BLEACHED TO TAN SPOTS (Occurs infrequently) Irregular shaped, tan to bleached leaf spots with dark margins. Photo by Chad Behrendt |
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WHITE POWDERY GROWTH (Occurs frequently) White to gray powdery growth on the leaf surface. Symptoms shown on rose leaves would be similar to those shown on this lilac leaf. Photo by Chad J. Behrendt |
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ORANGE PUSTULES (Occurs occasionally) Orange pustules on the bottom of leaves are similar to those shown on these rose stems. Small yellow spots occur on the upper leaf surface. Photo by U of MN Extension Service |
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YELLOW TO REDDISH BROWN SPOTS (Occurs occasionally) Irregular, yellow to reddish brown spots on the upper leaf surface. Photo by Chad Behrendt |
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YELLOW RING OR LINE PATTERNS (Occurs occasionally) Yellow & green mosaic, ring spots, or line patterns on leaves. Leaves may be stunted, curled, or distorted. Photo by Plant Disease Clinic |
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OTHER CAUSES Other symptoms caused by chemical, animal, or environmental factors. Photo by Chad Behrendt |