Cucurbit downy mildew outbreak in Southeastern North Carolina | NCCE

Source: Cucurbit downy mildew outbreak in Southeastern North Carolina | North Carolina Cooperative Extension

Cucurbit downy mildew was reported today (June 9, 2014) in a commercial cucumber field in Duplin County, North Carolina and confirmed by Dr. Lina Quesada’s Vegetable Pathology Lab at NC State University.

Symptoms were typical of downy mildew, including angular chlorotic lesions on the leaves and a grayish-brown “downy” appearance on the abaxial surface.  Structures of the oomycete Pseudoperonospora cubensis, the causal agent of cucurbit downy mildew, were identified using dissecting and compound microscopes, confirming the disease.