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Georgia watermelons

Georgia Watermelon Association 2025 Convention

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Late-season rainfall sparks disease outbreaks in watermelons

July 16, 2024August 15, 2024 cuccap Cucurbit Crop & Disease Management Resources

A week to 10 days after July 4 is when South Georgia watermelon production begins to slow down.

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Fusarium wilt had major impact on watermelons

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

There were about 1,500 additional acres planted this year in North Florida following last year’s bumper crop and high prices. However, fusarium wilt disease had a major impact on this year’s crop.

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Excessive Spring rain challenged watermelon crop

June 12, 2024August 15, 2024 cuccap Cucurbit Crop & Disease Management Resources

Early onset of foliar diseases, like downy mildew and gummy stem blight with a little bit of anthracnose made this an expensive spray year.

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Aggressive downy mildew infection in Florida and Georgia

May 22, 2024May 29, 2024 cuccap Cucurbit Crop & Disease Management Resources

Extension specialists want growers to have a heightened alert and to intensify scouting when we indicate alerts for any of these diseases or other pests.

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Late Georgia watermelon crop faces challenges

May 21, 2024August 15, 2024 cuccap Cucurbit Crop & Disease Management Resources

Watermelon diseases respond to weather conditions consistent with heavy moisture which was the case in Georgia recently. Tissue samples from fields are being analysed for Gummy stem blight and Fusarium. Disease management is going to be imperative.

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Georgia watermelon plantings delayed

April 18, 2024April 23, 2024 cuccap Cucurbit Crop & Disease Management Resources

South Georgia watermelon producers are behind in their plantings this spring. Excessive rains are the reason.

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Georgia producers begin planting 2024 watermelon crop

March 19, 2024August 15, 2024 cuccap Cucurbit Crop & Disease Management Resources

Producers and industry experts will be able to better assess this year’s acreage once all the plants are in the ground. They will once again follow North Florida in the production window.

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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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