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Use Resistant Varieties When Possible to Protect Against Whiteflies | VSCNews

September 18, 2020October 14, 2023 cuccap

“Whiteflies cause feeding injury issues in vegetables and transmit two new viruses: cucurbit leaf crumple virus and cucurbit yellow stunting disorder virus.”

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whitefly onfestation on leaf

Whitefly adults feed on a yellow squash seedling. Image from VSCNews

Cucurbit Crop & Disease Management Resources UGA Extension, Whitefly vectored plant virus. permalink.

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Cucurbit Downy Mildew epidemic updates August 14 to Sept. 14, 2020 | ipmPIPE
ONvegetables VCR | Sept. 10, 2020
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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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