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POWDERY MILDEW White to gray powdery cast on leaves, stems and/or buds and flowers. Photo by Plant Disease Clinic |
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BOTRYTIS Water-soaked lesions may appear on leaves or flowers. As disease progresses, any upper plant part may become blighted and coverd with a grey, fuzzy mold. Photo by Plant Disease Clinic |
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ROOT ROT Stems near soil line may turn brown and/or mushy. Photo by Plant Disease Clinic |
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SCAB Small lesions can occur on leaves and stems. Leaf lesions have whitish to brown centers with a dark red rim. A diffuse halo often forms around the spots. Photo by Plant Disease Clinic |
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STEM CANKER Leaves may turn yellow and fall. Stem cankers may appear corky, cause stems to split, and may cause death of individual stems. Photo by Plant Disease Clinic |
