Jun 26, 2017

Cucumber downy mildew confirmed in Dorchester County, Maryland

Downy mildew on cucumber was confirmed in Dorchester County, Maryland on June 21. The cucumber crop should be protected with a fungicide that targets downy mildew.

There are several fungicide options available: visit here.

Orondis and Ranman have performed well on cucurbit downy mildew in Maryland and Delaware and across the southeast. Cantaloupes and other melons should be sprayed with a targeted downy mildew product, also. Watermelon, pumpkin, squash, and other cucurbits should receive a protectant fungicide, but do not need a downy mildew targeted fungicide at this time because we have not yet seen downy mildew on anything but cucumber. Scout your fields aggressively.

Water soaking caused by new infections on cucumber leaf (top) and sporulation (bottom) with downy mildew.

–Kate Everts, Vegetable Pathologist, University of Delaware and University of Maryland; [email protected]

Source: University of Delaware Cooperative Extension