Michigan Cucurbit update | August 30, 2023 September 1, 2023December 1, 2023 cuccap Pumpkins are ripening on many farms. Early melon and watermelon plantings are ending and later plantings continue. Cucumber and pickle harvests continue from a rolling set of plantings. Both downy and powdery mildew are widespread. Powdery mildew pressure is relatively low overall. Continue Reading Powdery mildew can heavily infect cucurbit crops. Photo by Chris Galbraith, MSU Extension