
This guide is to be used only by commercial growers. Pest problems vary across the Southeast. This guide covers multiple states and production areas. Pesticide rates are a guideline.
Contents:
Authors:
Phillip M. Brannen
Publisher:
University of Georgia

Picture of symptoms similar to Downy Mildew in cucumber and squash.
Authors:
Mary K. Hausbeck
Publisher:
Michigan State University

Pictures of Downy Mildew symptoms in cucumber
Authors:
Mary K. Hausbeck
Publisher:
Michigan State University

First symptoms are yellowing of the foliage, beginning with the lower leaves and working upward. Yellowing often begins on one side of the vine. Infected leaves later show downward curling, followed by browning and drying.
The top of the vine wilts during the day and recovers at night, but wilting becomes progressively worse until the entire vine is permanently wilted. Vascular browning can be seen in infected stems and large leaf petioles.
Publisher:
AVRDC - The World Vegetable Center