Photo 1. Spots, light brown with yellow haloes, on leaf of passionfruit caused by Alternaria alternata.
Photo 2. Spots on passionfruit caused by Alternaria passiflora; they are generally larger than those of Alternaria alternata, especially on the fruits and stems.
Photo 3. Deeply sunken spots on a granadilla fruit, covered with dark spore masses of Alternaria passiflorae.
Brown spot and Alternata spot
Alternaria passiflorae (brown spot) and Alternaria alternata (Alternata spot).
AUTHOR Grahame Jackson
Information from Gerlach WWP (1988) Plant diseases of Western Samoa. Samoan German Crop Protection Project, Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) Gmbh, Germany; and information (and Photos 1,2&4) from Diseases of fruit crops in Australia (2009). Editors, Tony Cooke, Denis Persley, Susan House. CSIRO Publishing. Photo 3 Kohler F, Pellegrin F, Jackson G, McKenzie E (1997) Diseases of cultivated crops in Pacific Island countries. South Pacific Commission. Pirie Printers Pty Limited, Canberra, Australia.
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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