Downy mildew reported on cucurbits in Michigan

top view of disease symptoms on cucumber leaves including early symptoms of downy mildew on top with the yellow-brown tissue bordered by the leaf veins and views of the dark spores of the cucumber downy mildew pathogen seen on the undersides of leaves

Photos by David Perla, MSU.

CucCAP plant pathologist, Mary Hausbeck posted a news alert on July 3, 2024 for Michigan cucumber and melon growers. “Advanced symptoms of cucurbit downy mildew disease on cucumber plants in a commercial organic planting has been verified in Washtenaw County on July 2, 2024, which is 17 days earlier than last year.”