Robuta

https://vegpath.plantpath.wisc.edu/diseases/cucurbit-downy-mildew/ Cucurbit Downy Mildew – UW Vegetable Pathology – UW–Madison Cucurbit downy mildew is a water mold or oomycete disease of cucurbit crops caused by Pseudoperonospora cubensis. Symptoms first appear on the upper leaf... cucurbit downy mildewvegetablepathology