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Author: cuccap

Florida Cucurbit Updates | April 2023

April 7, 2023May 23, 2023 cuccap Cucurbit Crop & Disease Management Resources

Florida Extension agents and specialists report on: Powdery Mildew, Gummy Stem Blight, Cucurbit Viruses, Whiteflies, Thrips and Caterpillars.

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Emerging Viruses in Cucurbits Working Group

April 5, 2023June 23, 2023 cuccap CucCAP Melon Team, Cucurbit Crop & Disease Management Resources

The Emerging Viruses in Cucurbits Working Group (EVCWG) is charged with improving communication and virus knowledge across the cucurbit industry as well as developing strategies to successfully identify and mitigate virus threats to cucurbit production in the United States.

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CucCAP scientists genetically characterize the USDA germplasm collections for squashes and pumpkins

April 5, 2023April 5, 2023 cuccap CucCAP Squash Team, Featured Articles

This article presents the analysis of genotype data generated through genotyping-by-sequencing of the USDA germplasm collections of Cucurbita pepo, C. moschata, and C. maxima.

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Early watermelon crop survives frost events

March 24, 2023March 29, 2023 cuccap Cucurbit Crop & Disease Management Resources

Producers are very fortunate the cold temperatures were not more impactful, considering how early this year’s watermelon crop was planted in the region.

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The CucCAP Chronicle

March 23, 2023April 19, 2023 cuccap CucCAP Project

The Cucurbit Coordinated Project shares current news and events on the CucCAP website and in a monthly newsletter: The CucCAP Chronicle.

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PDMR 17 – Plant Disease Management Reports for Cucurbits

March 22, 2023July 30, 2024 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

PDMR, Volume 17, 2023
Results of 2021 & 2022 field trials were published in 2023.
Plant Disease Management reports for cucumber, melon, pumpkin, squash, and watermelon.

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Early planting for Florida melon farmers

March 21, 2023 cuccap Cucurbit Crop & Disease Management Resources

Some North Florida melon farmers were finished planting in the first days of March 2023.

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Early Career Scientist Spotlight | Yara Rosado Rivera

March 21, 2023July 21, 2024 cuccap CucCAP Disease Management Team

Yara performs field, greenhouse and lab research experiments in order to evaluate different disease management strategies for Cucurbit crops. One of the most important aspects of her position is to make research results available to growers.

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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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