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    • Cucumber Disease Management
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What is NOT Proper Crop Rotation | SC Grower

July 7, 2021March 31, 2022 cuccap Cucurbit Crop & Disease Management Resources

Clemson Plant Pathologist Tony Keinath clears up some confusion about what is a proper crop rotation to manage diseases caused both by pathogens that survive a few years in soil and pathogens that survive in soil longer than anyone can measure.

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CucCAP researchers identify QTL for resistance to Cucurbit yellow stunting disorder virus in melon

July 1, 2021May 25, 2023 cuccap CucCAP Melon Team, Featured Articles

Resistance to CYSDV is exhibited by melon PI 313970, a vegetable type melon introduced from India.

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South Carolina Extension updates | VSCNews

June 30, 2021September 27, 2023 cuccap Cucurbit Crop & Disease Management Resources

Watermelon downy mildew was found in two South Carolina counties this week.

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Michigan vegetable crop report – June 30, 2021

June 30, 2021July 26, 2023 cuccap Cucurbit Crop & Disease Management Resources

The recent overcast, humid, and wet conditions ensure that the sporangia will survive being transported via air currents from a diseased field to healthy cucumbers.

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North Florida Melon Season Nearing End | VSCNews

June 23, 2021July 16, 2021 cuccap Cucurbit Crop & Disease Management Resources

Watermelon harvests are nearing an end in North Florida. It’s time to take stock of how production went this season as 80% to 90% of the region’s crop has been harvested.

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Downy mildew identified in Ontario cucumbers

June 20, 2021June 2, 2022 cuccap Cucurbit Crop & Disease Management Resources

Plants in most areas are still very small and many grower will not have started their preventative fungicide programs. Now that the disease has been confirmed in Ontario, fungicides should be applied as soon as possible.

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Great Lakes EXPO returns to in-person event for 2021

June 18, 2021July 16, 2021 cuccap CucCAP Disease Management Team

The dates for the 2021 EXPO are set for Dec. 7-9, 2021.

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Cucurbit Downy Mildew epidemic updates June 2021 | ipmPIPE

June 17, 2021February 18, 2022 cuccap Cucurbit Crop & Disease Management Resources

Recent Updates: June 16: First reports from NC and MS. CDM has been confirmed on cucumber in Lenoir County, NC; and on cucumber and cantaloupe in Kemper County, MS.

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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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