Powdery Mildew – Melon Powdery Mildew Database at UC Riverside

Cucurbit powdery mildew is a chronic and major disease problem of cantaloupe and honeydew production worldwide. Early infection can kill plants or drastically reduce fruit yield; late infection reduces fruit quality. The cucurbit powdery mildew responsible for powdery mildew disease in the USA is Podosphaera xanthii. Two races of P. xanthii were known in California until 2003 when a […]

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Cucumber (Cucumis sativus) Breeding Line with Young Fruit Resistance to Infection by Phytophthora capsici

Cucumber production in the eastern and midwestern United States is subject to severe losses due to fruit rot caused by the soilborne oomycete pathogen, Phytophthora capsici. P. capsici preferentially infects cucumber fruits, especially young fruit, while leaves and vines remain healthy. Disease is manifested by extensive mycelial growth, sporulation, fruit rot, and tissue collapse. There are currently no commercial cucumber cultivars with resistance to this disease.

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