Photo 1. Early leaf spot of peanut with leaves showing distinctive yellow margins or haloes around the brown spots.
Photo 2. Late leaf spot of peanut, Passalora personata, on top of leaf. The spots have smaller yellow margins or haloes, compared to Photo 1, and the spots are darker. On symptoms alone, difficult to identify.
Peanut leaf spots, early and late leaf spots of peanuts (groundnuts)
Mycosphaerella arachidis (early leaf spot) and Mycosphaerella berkeleyi (late leaf spot). These are the names of the fungus that produce sexual spores. Where only asexual spores are present, the fungus is known as Passalora (Cercospora) arachidicola and Passalora (Cercosporidium) personatum, respectively.
AUTHORS Helen Tsatsia & Grahame Jackson
Photo 4 McKenzie E (2013) Passalora personata PaDIL - (http://www.padil.gov.au).
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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