Pacific Pests, Pathogens, Weeds & Pesticides - Online edition

Pacific Pests, Pathogens, Weeds & Pesticides

Cucurbit wet rot (144)


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Summary

  • Worldwide distribution. A common fungus, causing rots on fruit, flowers and leaves in bean, cucumber, papaya and tomato families. A minor disease.
  • Spores are splashed from soil onto wounds made by insects, weather events or during cultivation. Also, flowers wilt, become infected, then supply spores.
  • Spread is by spores on the wind. Worse in wet weather, high temperatures and high humidity.
  • Rots occur in cold storage without producing spores.
  • Cultural control: plant spacing important for squash and zucchini, allowing leaves to dry rapidly after rain.
  • Chemical control: none recommended.

Common Name

Cucurbit wet rot, Choanephora fruit rot, Choanephora blossom blight

Scientific Name

Choanephora cucurbitarum


AUTHORS Grahame Jackson & Mani Mua
Information from Gerlach WWP (1988) Plant diseases of Western Samoa. Samoan German Crop Protection Project, Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) Gmbh, Germany; and CABI (20019) Choanephora cucurbitarum (Choanephora fruit rot). Crop Protection Compendium. (
https://www.cabi.org/cpc/datasheet/13038); and from McKenzie E (2013) Choanephora cucurbitarum: PaDIL - http://www.padil.gov.au. Photo 1 Gerald Holmes, Valent USA Corporation, Bugwood.org.

Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community

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