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Cucurbit diseases reported in South Carolina

July 7, 2022December 6, 2023 cuccap Cucurbit Crop & Disease Management Resources

Extension Specialists and Agents in South Carolina report current specialty crop conditions in the South Carolina Grower which is shared by Ag Net Media.

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Charcoal Rot Showing Up in Cantaloupe – June 2022

June 30, 2022May 8, 2024 cuccap Cucurbit Crop & Disease Management Resources

Charcoal Rot Showing Up in Cantaloupe

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Heat Impact on Watermelons | AgNet Media

June 28, 2022August 4, 2023 cuccap Cucurbit Crop & Disease Management Resources

What growers experience when temperatures approach 100 degrees Fahrenheit (F).

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Alabama disease update | Powdery mildew on squash

June 23, 2022September 29, 2023 cuccap Cucurbit Crop & Disease Management Resources

Powdery mildew reported on yellow squash and a few other cucurbits in Alabama. It typically prefers hot and dry conditions.

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Cucurbit Downy Mildew updates June 2022 | ipmPIPE

June 15, 2022August 4, 2023 cuccap Cucurbit Crop & Disease Management Resources

The Cucurbit downy mildew forecast website provides a map and list of recent disease outbreaks.

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Cucurbit Downy Mildew present in multiple regions

June 15, 2022August 24, 2022 cuccap Cucurbit Crop & Disease Management Resources

Reports of the presence of Cucurbit downy mildew were published by Plant Pathologists in North America.

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Cucurbit Genetics Cooperative Reports #44 & 45

June 14, 2022June 21, 2024 cuccap CucCAP Melon Team, CucCAP Project Partners

CucCAP scientist James D. McCreight is a contributor to the 2021 CGC report.

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Cucurbit Genetics Cooperative Report #45

June 14, 2022June 21, 2024 cuccap Cucurbit Genetics, Genomics, & Pathology

CGC serves as an organizational vehicle for scientists to informally communicate the results of their research and development efforts.

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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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