EVALUATION OF SOME TRICHODERMA ISOLATES FOR BIOCONTROL EFFECT ON RHIZOCTONIA SOLANI

Gveroska, Biljana (2014) EVALUATION OF SOME TRICHODERMA ISOLATES FOR BIOCONTROL EFFECT ON RHIZOCTONIA SOLANI. Tobacco, 64 (7-12). pp. 27-35. ISSN 0494-3244

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Abstract

Tobacco production is affected by the need to reduce the use of pesticides due to strict standards in recent years. Therefore, all methods and means to control the harmful agents with minimal environmental impact and economic consequences are included. Biological control is a modern, environmentally friendly approach in plant protection, which is easily incorporated into the system of Integrated Pest Management. In plant pathology, the term biocontrol usually is concerning to the use of microbial antagonists to suppress diseases. Trichoderma strains are the most known biocontrol agents, mostly against many soil pathogens. Rhizoctonia solani is a very destructive pathogenic fungus, the causing agent of a damping off in tobacco seedlings. Therefore, our aim was to examine the impact of several Trichoderma isolates obtained from rhizosphere of tobacco plants against this pathogen. Investigations were carried out under in vitro conditions, using the method of dual cultures. Relative growth of the pathogen in the presence of biocontrol agent and the percentage of reduction of the radial growth of the pathogen were estimated. The relative growth was the weakest in PT1 and PT2 isolates (40.8 and 40.3%). These isolates showed the best results with the percentage reduction of pathogen 59.2 and 59.7%. PT3 and PT4 showed smaller effect (49.4 and 54.6% reduction). These investigations confirmed the role of this biocontrol agent control of the pathogenic fungus R. solani. Further research should be lead to the true determination of the species, as well as intended biocontrol effect on this pathogen. We believe that this research open the way for the application of Trichoderma species, with mass multiplication or commercial products.

Item Type: Article
Uncontrolled Keywords: biocontrol, Trichoderma sp., R. solani, relative growth, inhibition of radial growth
Subjects: Scientific Fields (Frascati) > Agricultural Sciences > Agriculture, forestry and fisheries
Divisions: Scientific Tobacco Institute
Depositing User: Ms Biljana Jordanoska
Date Deposited: 03 Nov 2016 22:18
Last Modified: 03 Nov 2016 22:18
URI: http://eprints.uklo.edu.mk/id/eprint/419

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