Post harvest association of moulds and aflatoxigenic strains of Aspergillus flavus in different varieties of wheat grains.

摘要

Grain samples of five commonly grown wheat varieties viz. WH-542, PBW-343, UP-2003, Kundan and PBW-502 of Bihar were analyzed for association of various moulds including Aspergillus flavus. Several moulds like A. niger, A. flavus, A. candidus, Cladosporium oxysporum, Curvularia clavata, C. lunata, Fusarium moniliforme, Mucor mucedo, Penicillium citrinum and R. stolonifer were found prevalent in all the varieties, however, their incidence level varied. Of the 37 A. flavus isolates recovered from wheat grains 19 were toxigenic. Of these, 8 isolates produced aflatoxin B 1 only, 5 produced both B 1 and B 2, 5 produced B 1, B 2 and G 1 and only one produced B 1 and G 1 but none of them produced aflatoxin G 2. Aflatoxin B 1 production ranged from 30-320 g l -1.