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Keinath Lab @ Clemson University

Cucumber downy mildew arrives in South Carolina

July 2, 2023July 24, 2023 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

This article for gardeners is published in The Post and Courier, a Charleston S.C. newspaper. The article discusses Cucurbit downy mildew on several varieties of cucumber, other cucurbits, and other crops.

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Fungicide management options | SC Grower

June 27, 2023December 1, 2023 cuccap Cucurbit Crop & Disease Management Resources

A fungicide sensitivity bioassay was conducted between June 1 and June 10 to determine which fungicides can be used against the current outbreak of powdery mildew on squash, watermelon and other cucurbits.

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2023 Fusarium Wilt experiment

June 23, 2023July 3, 2023 cuccap Cucurbit Crop & Disease Management Resources

From Clemson Plant Pathologist Tony Keinath. This year’s Fusarium wilt experiment includes 3 seedless cultivars, 3 fungicide treatments applied via drip irrigation, and grafting. preliminary results are based on disease development 10 weeks after transplanting.

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Downy Mildew in SC

June 20, 2023June 23, 2023 cuccap Cucurbit Crop & Disease Management Resources

Clemson plant pathologist Tony Keinath attributed the discovery at the Coastal Research and Education Center on June 12 to a rain event that occurred the previous week.

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Cucumber Team | 2023 Progress Report

June 10, 2023August 7, 2024 cuccap CucCAP Cucumber Team

View all tables and figures in pages 37 – 48 of the pdf version of this report.

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Integrated Crop and Disease Management Team | 2023 Progress Report

June 10, 2023August 7, 2024 cuccap CucCAP Disease Management Team

View all tables and figures in pages 62 – 85 of the pdf version of this report.

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Powdery Mildew on Watermelon in SC

May 27, 2023December 1, 2023 cuccap CucCAP Disease Management Team

CucCAP Plant Pathologist Tony Keinath found Powdery Mildew on seedless watermelon at the Clemson Coastal Research and Education Center (REC) on Tuesday, May 23.

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Powdery Mildew on Watermelon

May 26, 2023June 7, 2023 cuccap CucCAP Disease Management Team

Powdery mildew was found on three cultivars of seedless watermelon at the Clemson Coastal REC on May 23, 2023

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Featured Article

CucCAP scientists use cucumber core collection to map fruit quality traits

The CucCAP core collection, comprised of 388 accessions representing >96% of the genetic diversity for cucumber present in the U.S. National Plant Germplasm System, harbors important sources of disease resistance. As sources of resistance are often present in germplasm with poor fruit quality, scientists from Michigan State University characterized the collection for fifteen fruit quality traits. Genetic associations (QTL) for each trait were identified from genome-wide association studies (GWAS). Many of the genetic locations were in close vicinity to previously identified fruit trait QTL and candidate genes; several novel loci and genes potentially important for these traits were also identified.

For further reading:

Lin YC, Weng Y, Fei Z, Grumet R. 2025. Mining the cucumber core collection: phenotypic and genetic characterization of morphological diversity for fruit quality characteristics. Horticulture Research 12:uhae340.

 

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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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