First 2024 cucurbit downy mildew spores identified in air samples in Saginaw County, Michigan.
MSU Extension
The Michigan State University Vegetable Pathology Lab reports cucurbit disease outbreaks and control measures for these pathogens. County Extension Agents from across the state of Michigan publish bi-weekly crop updates including disease incidents and control measures throughout the growing season.
Michigan Cucurbit update | June 12, 2024
Field-planted cucumbers and zucchini are close to the first harvest in southwest Michigan. Angular leaf spot has been found in at least one farm, which can look like downy mildew. The Hausbeck lab at Michigan State University has begun deploying its spore traps for monitoring downy mildew as it as it moves north.
Michigan Cucurbit update | May 22, 2024
Pumpkins planted with plastic mulch tend to grow faster. This may may result in longer powdery mildew foliage management to protect fruit from sunburn.
Michigan cucurbit update | May 15, 2024
Michigan farmers are transplanting cucumbers and squash. Striped cucumber beetles are feeding. Seedless watermelons seedlings are germinating in Michigan greenhouses.
Michigan Cucurbit update | May 8, 2024
Squash and cucumbers have started going in on plastic mulch. Conventional growers typically use a seed treatment that is systemic for protection against striped cucumber beetles in the first few weeks when young plants are vulnerable.
MSU Disease Management Recommendations
MSU Extension plant pathologist Mary Hausbeck has released her updated “2024 Greenhouse Disease Management” guide.
