Powdery mildew is a fungal disease that affects many different types of plants. These white, powdery spots emerge in a circular pattern on the leaves, stems, and even the fruit.
What are the Symptoms of Powdery Mildew Infection?
Powdery mildew fungi produce structures that are inserted into plant cells, allowing them to extract nutrients required for development and spore production.
Which Vegetables and Plants are Affected the Most?
Powdery mildew infection can affect a wide variety of plants, as there are many different species of this fungal disease that attack different plant families.
Powdery mildew spores normally enter your garden with the wind. However, if you’ve experienced powdery mildew outbreaks in the past, subsequent outbreaks may also start from dormant spores in surrounding dead vegetation or weeds.
Plant resistant cultivars in sunny locations whenever possible. Prune or stake plants to improve air circulation. Make sure to disinfect your pruning tools (one part bleach to 4 parts water) after each cut.