Submitted to: International Sorghum and Millets Newsletter
Publication Type: Peer reviewed journal
Publication Acceptance Date: 7/1/2003
Publication Date: 2/1/2004
Citation: Tonapi, V.A., Wirojwattanakul, K., Vinh, D.V., Thein, M.M., Navi, S.S., Bandyopadhyay, R., Pande, S., Tooley, P.W. 2004. Prevalence of sorghum ergot in southeast asia. International Sorghum and Millets Newsletter. 44:95-97. Interpretive Summary: Ergot is a serious disease of sorghum throughout Southeast Asia in regions where sorghum is grown. Ergot influences economics of sorghum production, international seed exchange and other policy considerations. We report prevalence and distribution of ergot in different geographic regions of Vietnam, Thailand, and Myanmar. Ergot incidence and severity was recorded from fields in each country surveyed. A total of 286 fields were surveyed, and 24 fields were found to contain ergot. Samples were collected for further characterization in terms of morphology and genetic characteristics.
Technical Abstract: Ergot is a serious endemic disease in most of the sorghum producing countries of the world and is caused by Claviceps spp. We report here prevalence and distribution of ergot pathogens in different geographic regions of Vietnam, Thailand, and Myanmar in 2002. In Vietnam, 21 farms were surveyed, 178 farms in Thailand, and 87 farms in Myanmar. A total of 24 ergot samples were collected during the survey; two were from Vietnam, 18 from Thailand, and 4 from Myanmar. In Vietnam, ergot incidence was in traces with a severity ranging from 2% to 7% while in Thailand disease incidence ranged from traces to 80% and severity from 2 to 100%. In Myanmar, disease incidence ranged from traces to 40% and severity from 5 to 80%. Samples will be analyzed further for genetic characteristics.