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Specialty Crop Grower | Emerging Viruses of Cucurbits

April 16, 2024April 17, 2024 cuccap Cucurbit Crop & Disease Management Resources

CucCAP scientist Bill Wintermantel discusses the status of new virus diseases in the article, Tracking viral diseases in cucurbit crops on page 20 of the April edition of Specialty Crop Grower.

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Cucurbit Coordinated Agricultural Project 2024 Annual Meeting

April 12, 2024April 12, 2024 cuccap Featured Articles

The annual CucCAP conference was held in Salinas California on March 21 and 22, 2024. Thirty-three co-PIs, lab group members, and industry collaborators attended in person with an additional 26 online to share research results, extension and outreach activities, discuss findings, and share challenges and best approaches for research and extension strategies.

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Bio Fungicide Review on Winter Squash

April 10, 2024April 24, 2024 cuccap CucCAP Squash Team

The Smart Lab at Cornell University compared various organic controls for powdery mildew in winter squash including copper treatments.

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South Florida Pest and Disease Hotline | April 8, 2024

April 8, 2024April 8, 2024 cuccap Cucurbit Crop & Disease Management Resources

📢South Florida Pest and Disease Hotline📢
🍉 Increasing whitefly numbers, squash vein yellowing virus, cucurbit yellow stunting disorder virus, and papaya ringspot virus, Powdery mildew, Cucurbit downy mildew 🥒

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Bacterial and Alternaria leaf spot confirmed

April 6, 2024May 7, 2024 cuccap Cucurbit Crop & Disease Management Resources

Disease detection picked up over the previous week in North Florida watermelons.

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Favorable Weather for Fusarium pathogen

April 5, 2024May 7, 2024 cuccap Cucurbit Crop & Disease Management Resources

North Florida watermelon producers have observed Fusarium wilt symptoms in some fields. As the disease develops, plants will exhibit low vigor, wilting during the hottest parts of the day and have a grayish-green appearance.

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New Cucumber Publications | 2024

March 31, 2024July 31, 2024 cuccap CucCAP Cucumber Team

Cucumber – Breeding, Genetics, Genomics, Pathology Publications

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CucCAP Scientists present 2024 update

March 29, 2024April 12, 2024 cuccap CucCAP Project

The CucCAP teams presented recent progress to project stakeholders. The meeting was hosted by the CucCAP melon breeding team at the USDA-ARS Research center in Salinas California.

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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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