CucCAP
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    • Project Overview
    • Meet the CucCAP Project Team
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  • Crop & Disease management
    • Cucumber Disease Management
    • Melon Disease Management
    • Squash Disease Management
    • Watermelon Disease Management
    • Integrated Disease Management
  • Breeding & Genomics
    • Development of Genomic Tools for Cucurbit Species
    • Cucurbit Genomics Database
    • Cucurbit Breeding
    • Breeding Cucumber for Disease Resistance
    • Breeding Melon for Disease Resistance
    • Breeding Squash for Disease Resistance
    • Breeding Watermelon for Disease Resistance
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CucCAP Project

Contributions to the CucCAP project by the Bioinformatics Team, Cucurbit Crop Breeding Teams, and the Integrated Disease Management Team.

USDA Project Summary for the second CucCAP grant

September 1, 2020June 12, 2024 cuccap CucCAP Project

CucCAP 2: HARNESSING GENOMIC RESOURCES FOR DISEASE RESISTANCE AND MANAGEMENT IN CUCURBIT CROPS – BRINGING THE TOOLS TO THE FIELD is a grant funded by USDA-SCRI. The project start date is Sep 1, 2020 and the project end date is August 31, 2024.

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Whitefly-Transmitted Yellowing Viruses of Cucurbit Crops​​ | APS

August 30, 2020December 16, 2020 cuccap CucCAP Project

This webcast describes differences in symptoms caused by the whitefly-transmitted viruses known to infect U.S. cucurbit crops and discusses the importance of early virus identification, insect control, and management of weed and alternate crop host plants, as well as the potential for use of resistant varieties.

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Phytophthora roundtable discussion | GLVPN

August 26, 2020September 22, 2021 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

How can growers living with this devastating disease of cucurbits, peppers and tomatoes produce a harvestable crop? Dr. Smart works on the “Phytophthora farm” at Cornell University, land which is dedicated to researching solutions growers can use to deal with this disease.

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Pumpkin Downy Mildew Found in Surry County, North Carolina | NC State Extension

August 25, 2020September 22, 2021 cuccap CucCAP Disease Management Team

“Pseudoperonospora cubensis has two types of isolates or clades that preferentially infect certain cucurbit crops. In North Carolina, clade 2 isolates preferentially infect cucumbers and cantaloupes, while clade 1 isolates preferentially infect squash, pumpkin, and watermelon.”

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New photo gallery: Downy mildew of cucumber and other cucurbit plants | Cornell Extension

August 21, 2020October 13, 2021 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

“This disease can occur anywhere throughout the eastern US, even in a garden with just one cucumber plant and no past occurrences. This is because the pathogen spreads via wind-dispersed spores that can be moved long distances and be deposited by chance anywhere.”

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August 19, 2020 Vegetable Production Updates | MSU Extension

August 20, 2020September 26, 2023 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

Squash, cucumbers, and pumpkins experienced disease pressure from plant viruses, powdery mildew, fusarium, and phytophthora in Michigan during the week of August 13 to 19, 2020.

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CucCAP scientists uncover QTL associated with sulfur tolerance in melon, facilitating disease control options

August 7, 2020March 22, 2022 cuccap CucCAP Melon Team, Featured Articles

CucCAP researchers identified a major QTL associated with sulfur tolerance in a melon mapping population. Genetic markers were developed for the major QTL and can be used to incorporate sulfur tolerance in melon breeding programs.

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CucCAP Team 2020 Annual Meeting and Report

July 16, 2020July 21, 2020 cuccap CucCAP Project

An overview of accomplishments including genomic tools & databases, GBS collections & core populations, disease resistant cucurbit breeding lines, publications and presentations

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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

 

News, Events, and the latest Cucurbit Disease Information

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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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