Powdery mildew is one of the most widespread and easily recognized plant diseases. Powdery mildews are severe in warm, dry climates Many plants have been developed to be resistant or tolerant to powdery mildew.
Succulent tissue is more susceptible to infection.
Once the disease is a problem, avoid late summer applications of nitrogen fertilizer. Powdery mildews are one of the most widespread and easily recognized plant diseases. Even though there are several types of powdery mildew fungi, they all produce similar symptoms on plant parts. These are the cleistothecia or overwintering bodies of the fungus. The disease is most commonly observed on the upper sides of the leaves.