The Cucurbit Downy mildew ipmPIPE forcasts the likelihood of a CDM outbreak and reports outbreaks of the disease. August 10, 2019: New report from VA. CDM has been confirmed in Suffolk County, VA. August 8, 2019: First report from RI. New reports from SC, PA, and MD. CDM has been confirmed on butternut squash in […]
The Michigan State University Vegetable Pathology Lab teams up with Michigan State Extension to publish vegetable updates throughout the growing season. View the July 31 update here. Southeast Michigan vegetable update In pumpkins and winter squash, downy mildew has been found on hard squash in Pennsylvania and Tennessee. Downy mildew is a complex disease with […]
The Cucurbit Genetics Cooperative (CGC) was established in 1977 to develop and advance the genetics of economically important cucurbits. CucCAP Team members have contributed many articles to the Cucurbit Genetics Cooperative throughout the years. Members of the CucCAP Team contributing to CGC report#41 for 2018 include authors Todd Wehner and Jim McCreight along with editors, Amnon Levi and Linda Wessel-Beaver.
Cucumber Downy Mildew (CDM) has been confirmed on cucumber samples from our sentinel plot in Waynesville, NC (Haywood County) and from commercial growers in Burke and Henderson Counties. Approximately 75-100% of plants were affected. Leaves showed symptoms typical of CDM: angular, chlorotic or yellow lesions on the upper surface of the leaves with gray to […]
Southwest Michigan vegetable update Vine crop producers need to be aware that downy mildew has been confirmed at the Southwest Michigan Research and Extension Center. We found it on an unsprayed plot of pickles that we have since sprayed. Downy mildew is easiest to spot in the early morning when leaves are wet from dew. […]
Downy mildew on cucumber has developed in a small research plot at the Southwest Research and Extension Center in Benton Harbor, Michigan. This is the first confirmed report in Michigan in 2019. Disease symptoms developed over the last several days and this research plot had not been sprayed with any fungicides. Continue Reading
West central Michigan vegetable update Cucurbit downy mildew has not been reported in Michigan yet or in the Midwest, but spores were captured back in June. After that initial capture in Allegan County on June 28, no spores were captured through July 15. Powdery mildew was present at one hoophouse I visited, and pumpkin and squash […]
This plant pathogen lives in the soil and survives Michigan winters. It does not move via air currents but spreads via splash of contaminated soil, surface water such as culverts, rivers, creeks and streams contaminated by run-off from infested fields, and the dumping of diseased culls onto production fields. Phytophthora is especially unique because it can develop […]