Antagonism of Trichoderma harzianum and Gliocladium virens Isolates to Sclerotium rolfsii and Biological Control of Stem Rot of Groundnut and Betelvine

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Authors

  • Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani - 741 235, Nadia, West Bengal ,IN
  • Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani - 741 235, Nadia, West Bengal ,IN
  • Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani - 741 235, Nadia, West Bengal ,IN

DOI:

https://doi.org/10.18311/jbc/1991/15228

Keywords:

Trichoderma harzianum, Gliocladium virens, Sclerotium rolfsii, Stem Rot, Groundnut, Betelvine.

Abstract

Of the 15 isolates in each of Trichoderma harzianum and Gliocladium virens tested, one biotype of the former and three of the latter proved to be highly antagonistic to Sclerotium rolfsii. These isolates did not secrete any blostatic compound(s) into the medium but produced volatiles inhibitory to the pathogen. Histopathological studies revealed that the hyperparasite, G. virens attacked the pathogen hyphae by appressoria,hooks and intercellular growth. Production of the selectively high potential parasite in different solid surface media, their survival potential in such media and their use against S. rolfsii causing stem rot of ground nut and betelvine, both in greenhouse and field, are reported.