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Downy Mildew on Melon Leaves

Downy mildew infection of muskmelon caused by Pseudoperonospora cubensis.
Photo courtesy of C.E. Thomas, USDA

Downy mildew spores

Downy Mildew and Powdery Mildew on Melon leaf

early symptoms of downy mildew
Early lesions of downy mildew in melon usually appear water-soaked on the underside of leaves.Photo courtesy of J. G. Kantzes, Professor Emeritus, Department of Botany, University of Maryland