Photo 1. Angular brown spots on the leaf of watermelon, caused by the anthracnose fungus, Colletotrichum orbiculare.
Photo 2. Round and oval light brown spots showing "shot-hole" symptom on cucumber, caused by the anthracnose fungus, Colletotrichum orbiculare.
Photo 3. Large spots of cucurbit anthracnose, Colletotrichum orbiculare, on melon, showing the greyish water-soaked spots (lower left), and the brown older spots (top right) that are joining together and developing into an extensive rot.
Colletotrichum orbiculare; sometime known as Colletotrichum lagenarium. Three races are known.
AUTHORS Grahame Jackson
Photos 1 Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org. Photo 2 Gerald Holmes, California Polytechnic State University at San Luis Obispo, Bugwood.org. 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. Photo 4 Charles Averre, North Carolina State University, 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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