Photo 1. Stem rot, water mould, Phytophthora nicotianae. Rots are purple at first, later brown. When they girdled the stem they cause a wilt.
Fruit rot, Phytophthora blight
Phytophthora nicotianae; previously, Phytophthora nicotianae pv. parasitica. Note that in Fiji Phytophthora cinnamomi has also been reported as the cause of collar rot.
AUTHOR Grahame Jackson
Information (and Photo 2) from Gerlach WWP (1988) Plant diseases of Western Samoa. Samoan German Crop Protection Project, Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) Gmbh, Germany. Photo 1 Diseases of vegetable crops in Australia (2010). Editors, Denis Persley, Tony Cooke, Susan House. CSIRO Publishing.
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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