Downy mildew

Downy mildew refers to any of several types of oomycete microbes that are obligate parasites of plants. Downy mildews exclusively belong to the Peronosporaceae family. In commercial agriculture, they are a particular problem for growers of crucifers, grapes and vegetables that grow on vines.

The prime example is Peronospora farinosa featured in NCBI-Taxonomy and HYP3.
This pathogen does not produce survival structures in the northern states of the United States, and overwinters as live mildew colonies in Gulf Coast states.
It progresses northward with cucurbit production each spring.

Back to Garden Pests & Diseases →

Source: Wikipedia · Image: Wikimedia Commons · Public domain

GARDENERPLACE

A gardener's place — practical guides, plant know-how, and growing wisdom.

Get new guides by emailOccasional emails. No spam. Unsubscribe anytime.

InformationAbout Contact Privacy Policy Terms of Service Disclaimer Affiliate Disclosure Cookie Policy

Every species, image, fact, and figure is drawn from Wikipedia and Wikimedia Commons, used under public-domain and Creative Commons licenses. No content is AI-generated.