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Cucurbit Crop & Disease Management Resources

Plant Disease clinics in the USA, Cucurbit disease forecasters, Field & Variety Trials, Cucurbit Variety Trials, Pest Management, Cucurbit Production manuals & handbooks, Disease diagnosis, Disease outbreaks, Extension news, and Cucurbit Grower news.

Ontario CDM Spore Trap Network August update

August 26, 2021September 2, 2021 cuccap Cucurbit Crop & Disease Management Resources

University of Geluph researchers monitor Cucurbit downy mildew in Kent and Norfolk counties using spore traps.

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Crop updates from the Clemson Extension Agents

August 24, 2021August 27, 2024 cuccap Cucurbit Crop & Disease Management Resources

Some of the earliest planted fall squash and zucchini is being picked now.

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Management Options for Whiteflies | VSCNews

August 21, 2021August 27, 2024 cuccap Cucurbit Crop & Disease Management Resources

The buildup of whiteflies concerns growers because they feed on vegetables and transmit two viruses: cucurbit leaf crumple virus and cucurbit yellow stunting disorder virus.

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Plant Breeding key to Fusarium wilt management | VCSNews

August 19, 2021August 27, 2024 cuccap Cucurbit Crop & Disease Management Resources

University of Florida plant pathologists discuss watermelon breeding efforts for disease resistance to Fusarium wilt.”The key to eliminating fusarium wilt disease’s impact on watermelons in the Southeast is developing disease-resistance cultivars.”

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Cucurbit Downy Mildew epidemic updates August 2021 | ipmPIPE

August 18, 2021February 18, 2022 cuccap Cucurbit Crop & Disease Management Resources

Recent outbreaks of CDM for the period from July 21, 2021 to August 18, 2021.

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PDMR 15 – Plant Disease Management Reports for Cucurbits

August 16, 2021December 20, 2023 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

PDMR, Volume 15, 2021
Results of 2020 field trials, Published in 2021.
Plant Disease Management reports for cucumbers and squash.

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New photo gallery: Cercospora leaf spot of Cucumber

August 14, 2021September 22, 2021 cuccap Cucurbit Crop & Disease Management Resources

The Long Island Horticultural Research and Extension center’s Vegetable Pathology group added a new photo gallery of Cercospora leaf spot of Cucumber.

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Ontario CDM Spore Trap Network July update

August 7, 2021September 2, 2021 cuccap Cucurbit Crop & Disease Management Resources

Spore traps installed on June 7th in Ontario Canada detected no Cucurbit downy mildew until July 29, 2021.

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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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