Occurrence of airborne spores of fungi causing grain mould over a sorghum crop

Bandyopadhyay, R and Mughogho, L K and Satyanarayana, M V and Kalisz, M E (1991) Occurrence of airborne spores of fungi causing grain mould over a sorghum crop. Mycological Research, 95 (11). pp. 1315-1320. ISSN 0953-7562

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Airborne spores of Fusarium, Curvularia and Alternaria species which cause sorghum grain mould were monitored over rainy season crops of the grain-mould susceptible sorghum hybrid CSH 1 using a Hirst spore trap. Spore trapping began at the flowering stage (GS 61) and was continued beyond grain maturity (GS 92). Spores of all three fungal genera were present during the post-flowering stages. However, more spores were trapped after the hard dough stage (GS 87) than at earlier growth stages. Spore content in the air increased after grain maturity (GS 92) under moist or humid conditions. Fusarium spores were most prevalent before dawn, whereas most spores of Alternaria and Curvularia were trapped during the day. The frequency of Fusarium and Alternaria spores in the two years differed while that of Curvularia was similar in both years. The predominant species isolated from surface-sterilized moulded grain on malt-streptomycin agar were A. tenuissima, F. moniliforme, C. lunata and Phoma sorghina. These results prove that spores of mould causal fungi were naturally available in the air and initiated grain mould epidemics under suitable weather conditions.

Item Type: Article
Subjects: Mandate crops > Sorghum
Depositing User: Mr Charan Sai Ch
Date Deposited: 22 Oct 2011 06:51
Last Modified: 22 Oct 2011 06:51
URI: http://oar.icrisat.org/id/eprint/2956
Official URL: http://dx.doi.org/10.1016/S0953-7562(09)80583-2
Acknowledgement: UNSPECIFIED
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