US (MD): Cucumber downy mildew confirmed in Dorchester Co.
Water soaking caused by new infections on cucumber leaf (top) and sporulation (bottom) with downy mildew.
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.
Source: University of Delaware