International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 6
First page : (1450) Last page : (1456)
Article doi: http://dx.doi.org/10.18782/2320-7051.5181
Evaluation of Bioagents Against Rhizoctonia solani Kuhn Incitant of Cowpea (Vigna unuiculata L. Walp.) Web Blight Disease
Priyanka, S. L., Godara, Anand Kumar Meena* and Suresh Kumar
Swami Keshwanand Rajasthan Agricultural University, Bikaner, Rajasthan 334006
*Corresponding Author E-mail: anandraj.km@gmail.com
Received: 13.07.2017 | Revised: 21.08.2017 | Accepted: 28.08.2017
ABSTRACT
Cowpea web blight caused by Rhizoctonia solani (Kuhn) is an emerging disease in cowpea growing areas of Rajasthan and causes considerable yield losses. Antagonistic potentiality of locally isolated eleven fungal and six bacterial antagonists were evaluated against R. solani. Four Trichoderma strains i.e. T. harzianum (Th-BKN), T. harzianum (Th-JJN), T. viride (Tv-BKN) and T. harzianum (JPR) and two bacterial antagonists i.e B. subtilis (Bs-BKN) and P. fluorescens (Pf-BKN) gave distinct antagonistic reactions, showing stunting of R. solani colony and a clear zone of inhibition between colonies of antagonist and the pathogen was developed. The mode of antagonism against R. solani was studied under both in vitro and in vivo conditions. The culture filtrate of the test bioagents checked the mycelial growth of R. solani. Maximum inhibition of the pathogen growth was recorded in media amended with culture filtrate of T. harzianum (Th-BKN), Volatile substances produced by T. harzianum (Th-BKN) and T. viride (Tv-BKN) checked more than 60 per cent mycelial growth. Rest of the three bioagents i.e. Trichoderma atroviride (Ta-7), B. subtilis (Bs-BKN) and P. fluorescens (Pf-BKN) also suppressed the mycelial growth of the pathogen.
Key words: Web blight, Cowpea, Rhizoctonia solani, Bioagents, etc.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Priyanka, Godara, S. L., Meena, A.K. and Kumar, S., Evaluation of Bioagents Against Rhizoctonia solani Kuhn Incitant of Cowpea (Vigna unuiculata L. Walp.) Web Blight Disease, Int. J. Pure App. Biosci.5(6): 1450-1456 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5181
