Author(s): Amanda Gevens and Michelle Marks

Cucurbit downy mildew is a potentially serious disease of all plants in the gourd family (Cucurbitaceae), including cucumber, watermelon, cantaloupe, pumpkin, and squash. The disease causes sudden, rapidly developing and widespread foliar disease epidemics that can be very destructive. In recent years in the Midwestern United States, cucurbit downy mildew has been found primarily on cucumber.