- Narrow distribution. South and Southeast Asia, Oceania. On giant taro. A minor disease.
- Infection when leaves young, but spots develop later when leaves mature. Spots, grey, sunken with raised brown borders, sometimes with yellow halos.
- Sacs containing spores seen in the spots on the top surface of leaves. Sacs burst and spores spread in wind and rain.
- Cultural control: none; not likely to impact on corm yield.
- Chemical control: none recommended.
Pacific Pests, Pathogens, Weeds & Pesticides
Giant taro leaf spot (188)
Giant taro leaf spot
Mycosphaerella alocasiae; the asexual name is Passalora colocasiae.
AUTHOR Grahame Jackson & Eric McKenzie
Information (and Photo 2) McKenzie E (2013) Mycospheaella alocasiae: PaDIL - (http://www.padil.gov.au). Photo 3 Kohler F, et al. (1997) Diseases of cultivated crops in Pacific Island countries. South Pacific Commission. Pirie Printers Pty Limited, Canberra, Australia. Photo 4 Fred Brooks, University of Hawaii, 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.