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Clemson Cooperative Extension

Clemson Extension Agents Provide Crop Updates | VSC News

September 1, 2020July 7, 2022 cuccap Cucurbit Crop & Disease Management Resources

“Fall crops are continuing to progress well, though we are continuing to see a fair amount of disease like anthracnose, downy mildew, and bacterial spot due to the recent wet conditions.”

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S.C. Extension Updates | VSCNews

June 16, 2020August 27, 2024 cuccap Cucurbit Crop & Disease Management Resources

Clemson Extension Agents provided updates on vegetable crops including harvesting of melons in the Coastal Region, the squash and cucumber harvest in the Midlands and Pee Dee Regions, and Cucurbit downy mildew in the Pee Dee Region.

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Cantaloupe diseases present differently than in watermelon | Vegetable Growers News

May 2, 2020December 6, 2023 cuccap Cucurbit Crop & Disease Management Resources

June was hot and wet with temperatures consistently near 90˚ F and many areas getting close to 10 inches of rain, but it followed a May that was hot and dry with temperatures up to 100˚ F. That meant less gummy stem blight.

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Featured Article

CucCAP scientists identify markers for powdery mildew resistance in watermelon

Powdery mildew outbreaks, caused by Podosphaera xanthii, cause reduced yields and fruit quality in watermelon. CucCAP scientists at Clemson University and the USDA Vegetable Laboratory Charleston SC employed a bulked segregant analysis approach using data from 1147 accessions from the USDA Citrullus germplasm collection to perform an extreme-phenotype genome-wide association study (XP-GWAS) of tolerance to P. xanthii race 2W. Kompetitive Allele-Specific PCR (KASP) markers were designed for significant SNPs associated with reduced disease. The best marker in each region explained 21-31% of the variation in powdery mildew tolerance.

For further reading:

Branham et al., 2025. Extreme-phenotype genome-wide association study (XP-GWAS) of powdery mildew race 2 W tolerance in the USDA Citrullus germplasm collection. Scientific Reports. DOI10.1038/s41598-025-89445-8

 

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USDA National Institute of Food and Agriculture U.S. DEPARTMENT OF AGRICULTURE

The Cucurbit Coordinated Agricultural Project (CucCAP) is a USDA-National Institute of Food and Agriculture Specialty Crop Research Initiative grant under award number
2020-51181-32139.

Cooperating Institutions:

Boyce Thompson Institute; Cornell University; Michigan State University; North Carolina State University; Clemson University; University of Puerto Rico; University of Wisconsin; University of Florida; University of Georgia; West Virginia State University; U.S. Department of Agriculture, Agricultural Research Service

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