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Pest fungal infestation relationships influencing mycotoxin production in open and compact earheads of sorghum



Pest fungal infestation relationships influencing mycotoxin production in open and compact earheads of sorghum



International Journal of Tropical Plant Diseases 4(1): 51-58



Three different types of earheads which are generally found in sorghum such as compact panicles with open grains, open panicles with enclosed grains and normal panicles with normal grains were examined for the earhead pests and for the relationships between pest damage and fungal infestation on the production of mycotoxins. A total of 15 species of earhead pests belonging to 14 genera were isolated from one or the other varieties of sorghum. Altogether 35 fungal species belonging to 13 genera were isolated under study. Species belonging to Aspergillus, Curvularia, Fusarium and Penicillium were the most frequently isolated ones with the higher percentage contribution as well. In general compact headed varieties of sorghum were highly infested with pests and fungi than normal and open earheads. The greater mycotoxin contamination with high level was observed in the open grains of compact earheads containing high moisture when compared to the normal ones. While the least contamination was exhibited by the enclosed type of grains in the open panicles which were found to contain less moisture. The multiple factors such as nature of the panicle, glume covering of the grain, pest infestation, fungal invasion and moisture content of the grain greatly influence the production of mycotoxins in field sorghum.

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Accession: 006091025

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