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Cucurbit Crop & Disease Management Resources

Plant Disease clinics in the USA, Cucurbit disease forecasters, Field & Variety Trials, Cucurbit Variety Trials, Pest Management, Cucurbit Production manuals & handbooks, Disease diagnosis, Disease outbreaks, Extension news, and Cucurbit Grower news.

Watermelon Crop News | June 2022

June 3, 2022June 9, 2022 cuccap Cucurbit Crop & Disease Management Resources

North Florida producers have a finite harvest window following the production from the southern part of the state and preceding South Georgia production.

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Cucurbit Crop & Disease Management News | June 2022

June 2, 2022July 11, 2024 cuccap Cucurbit Crop & Disease Management Resources

Cucurbit Crop and Disease updates from plant pathologists and cooperative extension agents in the South and Midwest.

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Cucurbit Disease updates | June 2022

June 2, 2022June 2, 2022 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

On June 1, the CucCAP team observed Cucurbit Downy Mildew on cucumbers in North Carolina and Fusarium wilt on watermelon in South Carolina.

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Cucurbit Crop & Disease Management News | May 31, 2022

May 31, 2022July 11, 2024 cuccap Cucurbit Crop & Disease Management Resources

Reports from Cooperative Extension in South Carolina, Florida, and Michigan.

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Cucurbit Downy Mildew epidemic updates May 2022 | ipmPIPE

May 30, 2022May 24, 2023 cuccap Cucurbit Crop & Disease Management Resources

The first report of Cucurbit Downy Mildew in 2022 from Georgia was reported on May 4. CDM has been confirmed on cucumber in Brooks County, GA.

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South Carolina Field update | May 23, 2022

May 23, 2022August 27, 2024 cuccap Cucurbit Crop & Disease Management Resources

South Carolina Cooperative Extension agents report on Powdery mildew and Downy mildew in squash.

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Management of Gummy Stem Blight

May 19, 2022May 23, 2022 cuccap Cucurbit Crop & Disease Management Resources

UF/IFAS Extension confirmed this week that gummy stem blight disease is beginning to become a problem for Florida watermelons. Gummy stem blight causes lesions on leaves and stems and leads to defoliation. The disease favors warm, wet conditions.

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Preventative sprays for rindworms in watermelon

May 13, 2022May 23, 2022 cuccap Cucurbit Crop & Disease Management Resources

UF/IFAS Extension advises growers on a preventative program for rindworms.

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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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