Rudbeckia - Knowledgebase Question

Brownstown, Mi
Question by janicep5
June 7, 2010
My Rudbeckia has black spots on the leaves. the leaves curl up and get ugly. How can I stop this? I do not see bugs.

Answer from NGA
June 7, 2010


Rudbeckia is susceptible to fungal disease and I suspect that's why you are seeing black spots on the leaves. Ortho Garden Disease Control (chlorothalonil) and copper-based fungicides such as Soap Shield are labeled to control fungal leaf spot diseases on rudbeckia. Be sure to apply according to label directions.

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