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Cucurbit Downy Mildew epidemic updates August 14 to Sept. 14, 2020 | ipmPIPE

September 14, 2020February 18, 2022 cuccap Cucurbit Crop & Disease Management Resources

CDM has been reported in LA, MN, AL, OH, WV, WI, NY, OH. AR, IN, VT, MS, DE, PA, IN, IL, PA, KY, ON, MA, NH, ME, WV, KY, WV, VA, NY, PA, OH, TN, and NC. 

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Plant Health Exchange | Focus on Cucurbits

September 12, 2020July 16, 2021 cuccap CucCAP Project

The Plant Management Network (PMN) has been redesigned and is now an online resource called, The Grow: Plant Health Exchange. This is an outreach service of The American Phytopathological Society.

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Breeding Better Cucurbits | VSCNews

September 9, 2020August 27, 2024 cuccap Cucurbit Genetics, Genomics, & Pathology

In the September 2020 edition of the Vegetable and Specialty Crop News Magazine, CucCAP vegetable breeder Cecilia McGregor and Extentension Specialist George Boyhan discuss pumpkin, watermelon, and summer squash breeding work at UGA.

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Pumpkin decisions in the final stretch | GLVPN

September 9, 2020September 22, 2021 cuccap Cucurbit Crop & Disease Management Resources

The Great Lakes Vegetable Producer’s Network is a live weekly roundtable discussion during the growing-season for commercial vegetable producers in the Great Lakes and Midwest region. On Sept. 2, 2020 the topic was crop management at the end of the pumpkin growing season.

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Michigan vegetable updates – Sept. 9, 2020

September 9, 2020September 22, 2021 cuccap Cucurbit Crop & Disease Management Resources

East, Southeast, and Southwest Michigan Cooperative Extension agents reported on crop production of zucchini squash, yellow squash, pumpkins, winter squashes, and cantaloupe. Powdery mildew arrived late this year, making management easier.

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Managing Cucurbit Diseases with Research and Outreach

September 8, 2020January 31, 2022 cuccap CucCAP Project

The Cucurbit Coordinated Agricultural Project has been awarded $7.1 million from the U.S. Department of Agriculture’s Specialty Crop Research Initiative.

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CucCAP researchers identify watermelon root traits to improve tolerance to stress and diseases

September 7, 2020March 22, 2022 cuccap CucCAP Watermelon Team, Featured Articles

In a recent study, CucCAP researchers used a digital imaging technology to evaluate the root systems in 335 watermelon accessions.

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Ontario Vegetable Crop Reports for Sept. 3, 2020

September 3, 2020September 2, 2021 cuccap Cucurbit Crop & Disease Management Resources

Symptoms of Gummy Stem Blight in winter squash include hot spots of stems with oozing lesions, and distinctive patterns on the skin of butternut squash.

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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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