Efficacy of Colletotrichum gloeosporioides, potential fungi for bio control of Echinochloa crus-galli (Barnyard grass)
A systematic field study was conducted in agricultural fields such as food crops, pulses, vegetable crops, oil crops and commercial crops to estimate infestation of Echinochloa crus – galli (barnyard grass), a common terrestrial weed belonging to family poaceae. The in vitro pathogenicity studies on barnyard grass were conducted using spore inoculum (8X107/ml) of an indigenous fungus, Colletotrichum gloeosporioides. The pathogen was re-isolated from inoculated plants to fulfill Koch’s postulates and confirmed its host specificity on barnyard grass. The disease by the isolate was critically analyzed and the results revealed that Colletotrichum gloeosporioides is a potential agent to biological control of barnyard grass. The results revealed that the pathogen causes significantly (P < 0.05) severe infection on host weed and destructs the weed population by leaf spot diseases. The findings of the research suggested that the isolate Colletotrichum gloeosporioides is highly virulent and host-specific, and recommended for further studies as a promising biocontrol agent against barnyard grass weed.
Keywords: Mycoherbicides, Barnyard grass, Colletotrichum gloeosporioides, Koch’s postulates
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