Older plants may survive but the leaves are mottled with yellow. No chemical control is listed. Leaf spots may be seen during rainy seasons. No chemical control is listed. Dispose of infected leaves.
Powdery mildew coats the leaves with a white powdery growth.
Applications of benomyl or sulfur control this disease. Aster yellows causes the death of plants. Diseased plants are removed and destroyed. No chemical control is available. This information is for educational purposes only.