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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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MSU Extension

The Michigan State University Vegetable Pathology Lab reports cucurbit disease outbreaks and control measures for these pathogens. County Extension Agents from across the state of Michigan publish bi-weekly crop updates including disease incidents and control measures throughout the growing season.

August 2020 Michigan Vegetable Updates | MSU Extension

August 12, 2020September 22, 2021 cuccap Cucurbit Crop & Disease Management Resources

Michigan Cooperative Extension agents from East, Southeast, West, and Southwest Michigan published crop updates on cucumber, melon, watermelon, pumpkins, and winter squashes. Reports of pests include Downy mildew, Powdery mildew, and Squash bug.

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Cucumber downy mildew update on spore detection | MSU Extension Vegetables

June 22, 2020September 27, 2023 cuccap CucCAP Disease Management Team

Our molecular analysis of the spore trap samples from Berrien County has recently confirmed cucumber downy mildew spores in the air for June 8, 10 and 13, 2020. For the Muskegon spore trap, there was a positive for cucumber downy mildew spores for June 8.

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June 3 Michigan Vegetable updates | MSU Extension Vegetables

June 3, 2020June 2, 2022 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

Michigan State University Extension helps people improve their lives by bringing the vast knowledge resources of MSU directly to individuals, communities and businesses.

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SE Michigan Winter Vegetable Meeting

9:00am Powdery Mildew Update by Doug Higgins from the Hausbeck Lab at MSU

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CucCAP Pathologists Provide Growers with Tools for Cucurbit Disease Management

September 3, 2019July 9, 2021 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources, Featured Articles

CucCAP Vegetable Pathologists provide cucurbit producers with techniques for cucurbit disease management and connect growers with research seeking new solutions for cucurbit diseases.

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Cucumber downy mildew moves across Michigan | MSU Extension Vegetables

August 21, 2019October 8, 2020 cuccap CucCAP Disease Management Team

Downy mildew on cucumber has been verified in three counties on the west side of Michigan and one county on the east side of Michigan. Cantaloupe crops are also at risk.

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August 7 Michigan Vegetable Updates | MSU Extension Vegetables

August 7, 2019December 15, 2022 cuccap CucCAP Disease Management Team

The Michigan State University Vegetable Pathology Lab teams up with Michigan State Extension to publish vegetable updates throughout the growing season.

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Cucumber downy mildew disease confirmed in research plot in southwest Michigan | MSU Extension Vegetables

July 29, 2019September 22, 2021 cuccap CucCAP Disease Management Team

Downy mildew on cucumber has developed in a small research plot at the Southwest Research and Extension Center in Benton Harbor, Michigan. This is the first confirmed report in Michigan in 2019.

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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

  • CucCAP Featured Articles
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  • CucCAP Team News
  • Cucurbit Crop and Disease News
  • Upcoming Events
  • Cucurbit Disease Factsheets
  • Plant Disease Clinics
  • Field Trial Reports
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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