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downey-mildew-cucumber

February 22, 2017February 24, 2017 Mary Lorscheider
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disease symptoms on cucumber plant

Downy mildew on Cucumber
Image provided by Y. Weng and T. Wehner

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Featured Article

CucCAP scientist documents emergence of new melon and watermelon virus in southwestern U.S.

Commercial fields of melon and watermelon exhibiting mosaic symptoms and foliar distortion of new growth were observed in Arizona and California. Although testing of symptomatic plants for presence of five whitefly- or aphid- transmitted viruses detected cucurbit yellow stunting disorder virus (CYSDV) in most samples, and some infection by cucurbit chlorotic yellows virus (CCYV), not all symptoms were typical of CYSDV or CCYV. Further analysis for begomoviruses showed that the majority of samples were co-infected by watermelon chlorotic stunt virus. (WmCSV), a new virus that had not been previously reported to infect cucurbit crops in the U.S.

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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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