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.
The pesticide information on this page may become out of date as products and active ingredients change or become unavailable. Some of the pesticides listed are only available for use by licensed pesticide applicators. No endorsements of named products are intended, nor is criticism implied of products not mentioned.
