Photo 1. Young yellowish leaf spots, 3-5 mm diameter, of coffee rust, Hemileia vastatrix, on the upper surface of a coffee leaf mostly between the veins. Some of the spots are starting to merge.
Photo 2. Yellow-orange spots on the underside of a coffee leaf caused by coffee rust, Hemileia vastatrix. The spots have started to form powdery spores.
Coffee leaf rust
AUTHOR Grahame Jackson
Information (and Photos 1&2) from Gerlach WWP (1988) Plant diseases of Western Samoa. Samoan German Crop Protection Project, Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) Gmbh, Germany. 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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