Resistance to fungicides is a concern with cucumber downy mildew, Pseudoperonospora cubensis clade 2. These fungicides still suppressed downy mildew well enough that yields of marketable-sized fruit of a susceptible slicing cucumber were much better than not spraying.
Libby is identifying which of Michael Mazourek’s Cucurbita moschata and C. maxima breeding lines are: 1) resistant to powdery mildew and 2) candidate replacements for the susceptible cultivars used in the processing industry.
These fact sheets are updated annually and posted on the Hausbeck lab website at Michigan State University.
The NC State Vegetable Pathology Lab has developed a series of fact sheets describing cucurbit diseases and providing information on how to manage the pathogens causing them. The CucCAP team in collaboration with the Quesada lab developed Spanish translations of these factsheets.
These fact sheets are published at Land-Grant Press by Clemson Extension and contain information pertinent to South Carolina. Diagnostics and management may vary in other states or countries.
CucCAP scientist James D. McCreight is a contributor to the 2021 CGC report.
Cucurbit downy mildew (CDM), is an economically significant disease of cucurbitaceous crops in the Eastern United States (US). Cucumbers are particularly susceptible and as a result, disease management of this pathogen relies heavily on fungicide use.
Before her current position as a Genetic Purity Lab Manager in the Quality Assurance Department at Sakata Seed America, Inc., in Salinas California, Bidisha Chanda worked for the USDA and conducted research for the CucCAP watermelon team at the US Vegetable Laboratory in Charleston, South Carolina.