Can I compost plants covered with powdery mildew?

Gardens & Landscapes July 07, 2010 Print Friendly and PDF
Remove and destroy all infected plant parts (leaves, etc.). For infected vegetables and other annuals, remove as much of the plant and its debris in the fall as possible. This decreases the ability of the fungus to survive the winter. Do not compost infected plant debris. Temperatures often are not hot enough to kill the fungus. For more information on plants covered with powdery mildew please see the fact sheet "Powdery Mildews."

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.