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Antagonistic Activity of Fungi and Bacterium against Red Rot Disease of Saccharum officinarum: An Approach for Biocontrol

Shardesh Kumar Chaurasia

Abstract


The Two species of fungus Trichoderma harzianum and Aspergillus flavus and one species of bacterium viz. Bacillus subtilis were tested for antagonistic activity in vitro against Colletotrichum falcatum, pathogen of red rot disease of sugarcane. Two Saccharum officinarum cultivars viz. CoS 98231 and CoLK 8102 in pot and field experiments, by a dual culture technique. It was found that isolates of fungal and bacterial inhibited the mycelial growth of C. falcatum, overgrew C. falcatum colonies and antagonized mycelial growth. In contrast, when the two varieties were tested separately in different field locations, the sets treated with A. flavus in combination with a spray or soil application of T. harzianum had the lowest incidence of red rot in all locations, e.g. 3.1% and 3.4% incidence for CoS 98231 in one location and they had a similar response to the chemical control. These results suggest the applicability of plant-based extracts for the suppression of red rot disease of sugarcane in the field as an environment-friendly tool in combination with antagonists.

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References


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DOI: https://doi.org/10.37628/ijpb.v2i2.129

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