- Worldwide distribution. On cucumber and tomato as the cause of a major disease; a minor disease on many others. On papaya, occasional loss of fruit yield and quality.
- Spots, angular, brown, 2 mm with yellow halos and white centres that often fall out. Best seen from below. May become larger and merge in wet weather. Spread is by spores in wind and rain.
- Cultural control: none recommended for papaya, but it is recommended not to plant tomato or cucumber near papaya with brown leaf spot.
- Chemical control: chlorothalonil, mancozeb, or copper. Note, tebuconazole is used for black spot.
Pacific Pests, Pathogens, Weeds & Pesticides
Papaya brown spot (300)
Papaya brown spot, papaya shot-hole, Corynespora leaf spot
AUTHOR Grahame Jackson
Information from Diseases of fruit crops in Australia (2009). Editors, Tony Cooke, et al. CSIRO Publishing. Photo 2 Mike Furlong, University of Queensland, Brisbane; and from Liberato JR, McTaggart AR (2006) Corynespora Brown Spot of Papaya (Corynespora cassiicola): PaDIL - http://www.padil.gov.au. Photo 3 Gerald Holmes, California Polytechnic State University at San Luis Obispo, 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.