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Cucurbit Downy Mildew updates May 2023 | ipmPIPE

June 16, 2023July 7, 2023 cuccap Cucurbit Crop & Disease Management Resources

CDM Epidemic Updates for May 5, 2023 to June 13, 2023.

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2024 NWA Research Grant Program

June 14, 2023June 14, 2023 cuccap CucCAP Project Partners

Details on the National Watermelon Association’s grant funding request for proposals. Stay in touch with NWA staff for further details, and to apply for funding.

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Clade 2 Cucurbit downy mildew spores in Michigan

June 13, 2023July 3, 2023 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

Growers are urged to scout cucumbers and melons and check the website for updates.

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Michigan cucurbit update | June 7, 2023

June 13, 2023August 21, 2023 cuccap Cucurbit Crop & Disease Management Resources

Cucurbit planting continues across lower Michigan. Pumpkins and hard squash plantings are starting up this week for fall markets. Early cucumber plantings are at first flower this week, and some farms may be harvesting zucchini soon. The early summer squash plants in southwest Michigan jumped with the heat last week.

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SC Grower weekly report | June 12, 2023

June 13, 2023 cuccap Cucurbit Crop & Disease Management Resources

Crops coming to market include squash and cucumbers. Cantaloupe is developing well, but keep a close eye out for disease issues.

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Cucumber Team | 2023 Progress Report

June 10, 2023August 7, 2024 cuccap CucCAP Cucumber Team

View all tables and figures in pages 37 – 48 of the pdf version of this report.

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Integrated Crop and Disease Management Team | 2023 Progress Report

June 10, 2023August 7, 2024 cuccap CucCAP Disease Management Team

View all tables and figures in pages 62 – 85 of the pdf version of this report.

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Melon Team | 2023 Progress Report

June 10, 2023August 7, 2024 cuccap CucCAP Melon Team

View the 2023 CucCAP Melon Team Report in pages 35-48 of the PDF version of this report

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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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