Use of local isolates of Trichoderma from Madhya Pradesh against Rhizoctonia solani causing wet root rot of chickpea

Kumar, A. and Sahu, T.K. (2015) Use of local isolates of Trichoderma from Madhya Pradesh against Rhizoctonia solani causing wet root rot of chickpea. Environment and Ecology, 33 (4). pp. 1553-1557.

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Abstract

Trichoderma spp. are free-living fungi mat are common in soil and root ecosystems. They are opportunistic, avirulent plant symbionts, as well as being parasites to other fungi. At least some strains establish robust and long-lasting colonizations of root surfaces and penetrate into the epidermis and a few cells below this level. To explore this novel biocontrol potential of Trichoderma spp., in-vitro potentialities of five isolates of Trichoderma were evaluated against phytopathogen Rhizoctonia solani by dual culture techniques. A set of six isolates of R. solani were also evaluated for their pathogenic aggressiveness and they were found variable in producing the disease on chickpea. The most aggressive isolate produced 75.25% mean disease incidence on chickpea and was further used in confrontation assay with Trichoderma. The maximum growth inhibition of R. solani (54.2%) was observed by antagonist isolate T2 (REWA) at 4 days after inoculation. Further, mycoparasitism of antagonists was observed upto 10 days. Pattern of growth inhibition of test fungus was continued with overgrowth on test pathogen by Trichoderma isolate. It was also observed on prolonged incubation that hard resting structures, sclerotia, were also parasitized by Trichoderma.

Item Type: Article
Uncontrolled Keywords: Chickpea, Wet root rot, Rhizoctonia solani, Trichoderma, Confrontation assay
Author Affiliation: Department of Plant Pathology, Jawaharlal Nehru Krishi Vishwa Vidyalaya (JNKVV) College of Agriculture, Rewa, MP 486 001, India
Subjects: Crop Improvement
Divisions: Chickpea
Depositing User: Mr B Krishnamurthy
Date Deposited: 04 Dec 2015 08:25
Last Modified: 04 Dec 2015 08:25
URI: http://eprints.icrisat.ac.in/id/eprint/14056

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