Alternaria blight—Alternaria spp.
Alternaria blight is a disease on carnation. It causes tan
spots or blotches with purple margins to occur on leaves,
flowers, or stems. Lesions may be around the stem base.
Solutions
Use good sanitation. Remove infected plants
and debris. Avoid overhead irrigation. Water in the morning
so that plants dry quickly.
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Alternaria leafspot lesion
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