Powdery Mildew on cucumber and squash in Western North Carolina Powdery Mildew is caused by the fungal pathogens Podosphaera xanthii and Erysiphe cichoracearum. Disease can occur on all cucurbit crops. However, due to the incorporation of resistance genes, most commercial cucumber and melon cultivars are less susceptible. High-humidity (50-90%), moderate temperatures (68 to 80 ℉), dense foliage, and […]
Crop & Disease Management
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September 5 Vegetable Updates | MSU
Pumpkin management in the final stretch The evidence of proper management shows up now. Some issues can still be addressed, but others required attention months ago. Poor control of Powdery Mildew will result in defoliation, sunburned fruit and weak, brown handles. There is limited effectiveness with rescue sprays for powdery. Fruit rots are triggered in some fields […]
August 22 Vegetable Updates | MSU
Vegetable crops and their response to nitrogen Most cucurbit crops do not convert nitrogen to fruit very well. Their response to excess levels of nitrogen is to grow more plant, which potentially leads to increased disease problems and later production. Increased diseases can occur because the increased leaf canopy inhibits air movement leading to increased […]
Pest and Disease Management for Organic Squash | VSCNews
Both summer and winter squash can be plagued by many pests and diseases, and plants often die early. For summer squash (Cucurbita pepo), problems include squash vine borers, squash bugs, downy mildew and cucurbit yellow vine disease (CYVD). CYVD is a bacterial disease transmitted by squash bugs that can quickly kill plants as they start […]
August 15 Vegetable Updates | MSU
West central Michigan vegetable update In cucurbits, cucurbit downy mildew has been on the move in west Michigan. Read more. East Michigan vegetable update Pickling cucumber harvests are rolling. Downy mildew reports are still coming in from the Thumb and southeast Michigan. It is a good time to use Ranman or Orondis Opti on new and older […]
August 8 Vegetable Updates | MSU
Central Michigan vegetable update For pickles, I do not have any confirmed reports of downy mildew in this part of Michigan yet, however, growers are advised to continue downy mildew fungicide spray programs. The disease has been confirmed in Michigan. See: https://veggies.msu.edu/wp-content/uploads/2018/08/DMCucurbitDownyMildewMap_8.7.18.pdf Harvest of summer squash continues with powdery mildew becoming more prevalent. Read more. Southwest Michigan vegetable update Cucurbit downy […]
August 3 Vegetable Update | NC State
Vegetable Production Updates Downy mildew was reported on cucumbers, cantaloupe, and butternut squash in sentinel plots at the Mountain Research Station in Haywood County. Downy mildew was also reported on cucumbers in sentinel plots in Henderson County. Southern blight was reported on cucurbits, peppers, and tomatoes in Western North Carolina. In most cases, southern blight […]
August 3 Michigan vegetable update | MSU
West central Michigan vegetable update – Aug. 3, 2018 In cucurbits, cucurbit downy mildew was detected at additional sites in southwest Michigan as well as in Saginaw and Arenac counties over the last week; it is on the move and cucumbers and melons need to be protected. Phytophthora capsici was causing fruit rot and leaf lesions in […]
