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Cucurbit Downy Mildew

Powdery mildew and downy mildew most common diseases in survey

July 14, 2022December 1, 2023 cuccap Cucurbit Crop & Disease Management Resources

American Vegetable grower magazine shared results of a recent nationwide survey. This article presents a slide show of the survey results. Powdery mildew is the top pest across five out of six U.S. regions, downy mildew topped powdery mildew by one percentage point in the Southeast.

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Cucurbit Downy Mildew updates June 2022 | ipmPIPE

June 15, 2022August 4, 2023 cuccap Cucurbit Crop & Disease Management Resources

The Cucurbit downy mildew forecast website provides a map and list of recent disease outbreaks.

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CucCAP researchers evaluate disease control options for downy mildew on pickling cucumber

June 14, 2022August 1, 2022 cuccap CucCAP Disease Management Team, Featured Articles

Cucurbit downy mildew (CDM), is an economically significant disease of cucurbitaceous crops in the Eastern United States (US). Cucumbers are particularly susceptible and as a result, disease management of this pathogen relies heavily on fungicide use.

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Cucurbit Downy Mildew epidemic updates May 2022 | ipmPIPE

May 30, 2022May 24, 2023 cuccap Cucurbit Crop & Disease Management Resources

The first report of Cucurbit Downy Mildew in 2022 from Georgia was reported on May 4. CDM has been confirmed on cucumber in Brooks County, GA.

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Downy Mildew | Alabama Cucurbit Disease Update

May 13, 2022May 24, 2022 cuccap Cucurbit Crop & Disease Management Resources

A late freeze in Florida combined with hot and dry conditions in May may have contributed to no presence of Cucurbit Downy Mildew in Alabama so far during this growing season.

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Disease update for Florida watermelons

May 11, 2022May 6, 2024 cuccap Cucurbit Crop & Disease Management Resources

UF/IFAS Extension reports on disease priorities for Florida cucurbit growers. Management of Downy mildew, gummy stem blight, and powdery mildew management on watermelon and cantalope.

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Cucurbit Downy Mildew Management

May 9, 2022May 24, 2022 cuccap CucCAP Disease Management Team

CucCAP plant pathologist, Anthony Keinath published a factsheet on cucurbit downy mildew management with sections on symptoms and signs, how cucurbit downy mildew spreads, cultural practices to limit cucurbit downy mildew, and spraying for cucurbit downy mildew.

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Watermelon Fungicide Guide

March 28, 2022August 27, 2024 cuccap Cucurbit Crop & Disease Management Resources

CucCAP plant pathologist, Anthony Keinath published a watermelon fungicide guide for 2022.

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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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