CDM has been reported in LA, MN, AL, OH, WV, WI, NY, OH. AR, IN, VT, MS, DE, PA, IN, IL, PA, KY, ON, MA, NH, ME, WV, KY, WV, VA, NY, PA, OH, TN, and NC.
Cucurbit Downy Mildew
Clemson Extension Agents Provide Crop Updates | VSC News
“Fall crops are continuing to progress well, though we are continuing to see a fair amount of disease like anthracnose, downy mildew, and bacterial spot due to the recent wet conditions.”
Pumpkin Downy Mildew Found in Surry County, North Carolina | NC State Extension
“Pseudoperonospora cubensis has two types of isolates or clades that preferentially infect certain cucurbit crops. In North Carolina, clade 2 isolates preferentially infect cucumbers and cantaloupes, while clade 1 isolates preferentially infect squash, pumpkin, and watermelon.”
August 19, 2020 Vegetable Production Updates | MSU Extension
Squash, cucumbers, and pumpkins experienced disease pressure from plant viruses, powdery mildew, fusarium, and phytophthora in Michigan during the week of August 13 to 19, 2020.
Cucurbit downy mildew epidemic July 20, 2020 to August 18, 2020 updates | ipmPIPE
In July and August, CDM was reported in NC, KY, VA, WV, NY, PA, OH, TN, NJ, CT, IN, KS, ON, IN, KS, ON, QC, MD, MA and AL.
Cucurbit Downy Mildew Confirmed in Western NC | NC State Extension Plant Pathology
Symptoms typical of CDM include angular, chlorotic or yellow lesions on the upper surface of the leaves with gray to black spores on the underside of the leaf.
August 2020 Michigan Vegetable Updates | MSU Extension
Michigan Cooperative Extension agents from East, Southeast, West, and Southwest Michigan published crop updates on cucumber, melon, watermelon, pumpkins, and winter squashes. Reports of pests include Downy mildew, Powdery mildew, and Squash bug.
