Source: NCSU COOPERATIVE EXTENSION, 6/16/21


Pseudoperonospora cubensis, the causal agent of cucurbit downy mildew (CDM), was confirmed on cucumbers in Lenoir county on June 15. The sample was part of the CDM sentinel plots yearly deployed by the NC State Vegetable Pathology Lab. The sentinel plot showed 15% disease incidence and leaves showed 3% disease severity. Chlorotic lesions, angular in shape, were observed on the upper surface of leaves along with gray sporulation on the underside, which are typical symptoms and signs of CDM (Figure 1).

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