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    • Project Overview
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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
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    • Breeding Cucumber for Disease Resistance
    • Breeding Melon for Disease Resistance
    • Breeding Squash for Disease Resistance
    • Breeding Watermelon for Disease Resistance
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Custom Cucurbit Downy Mildew Alerts

March 18, 2022March 22, 2022 cuccap Cucurbit Crop & Disease Management Resources

To receive a customized text or email alert for your area when new outbreaks of Cucurbit Downy Mildew are confirmed, fill out the form on the CDM ipmPipe Cucurbit Downy Mildew forcasting website.

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Cucurbit Anthracnose | Management strategies include resistant varieties

March 18, 2022May 24, 2022 cuccap Cucurbit Crop & Disease Management Resources

Alabama plant pathologists highlight management options for Anthracnose in cucurbits including using disease resistant varieties.

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Cucumber beetles transmit bacterial disease

March 15, 2022March 31, 2022 cuccap Cucurbit Crop & Disease Management Resources

An Auburn University Extension Specialist explains that cucumber beetles are vectors for bacterial disease in cucurbits. Both the spotted cucumber beetle and the striped cucumber beetle feed together on young plants early in the growing season.

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Freezing temperatures impact Florida Watermelon producers

March 15, 2022March 15, 2022 cuccap Cucurbit Crop & Disease Management Resources

North Florida Watermelon Plants Impacted by Sub-Freezing Temperatures

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CucCAP researchers identify QTL for Phytophthora resistance in squash

March 1, 2022April 1, 2022 cuccap CucCAP Squash Team, Featured Articles

Scientists at the University of Florida led by Geoffrey Meru characterized resistance to Phytophthora crown rot in PI 181761 and identified a major QTL on chromsome 13. Several SNP markers were designed to target this QTL for marker-assisted selection.

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2022 Greenhouse Pest Management Recommendations

February 24, 2022March 22, 2022 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

CucCAP Plant Pathologist, Mary Hausbeck, has released new Greenhouse Disease Management recommendations for 2022. The Hausbeck Lab collaborated with other MSU Extension specialists to develop a guide for disease management for vegetable and herb crops. 

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Vectors and disease present in Florida cucurbits

February 22, 2022March 22, 2022 cuccap Cucurbit Crop & Disease Management Resources

Florida cucurbit growers are reporting whiteflies, gummy stem blight, powdery mildew, and cucurbit downy mildew.

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Planting Cucumbers Early to Avoid Downy Mildew

February 18, 2022June 2, 2022 cuccap CucCAP Cucumber Team, CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

Downy mildew affects cucumber crops in South Carolina every year and can cause huge crop losses. Clemson University researchers say planting early can cut growers’ losses.

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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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