IN VITRO EFFICACY OF BIO -AGENTS AND ORGANIC AMENDED SOIL EXTRACTS AGAINST COLLETOTRICHUM

INVITRO EFFICACY OF BIO -AGENTS AND ORGANIC AMENDED SOIL EXTRACTS AGAINST COLLETOTRICHUM GRAMINICOLA CAUSING ANTHRACNOSE OF SORGHUM
Rekha* and Yogendra Singh
Department of Plant Pathology, College of Agriculture, G.B.Pant University of Agriculture and Technology , Pangtnagar-263145,U.S.Nagar, Uttarakhand,India
[Corresponding author E-mail-*: rekhashankhwar1986@gmail.com]
Received: 02-01-2016 Accepted: 29-06-2016

Abstract:
Anthracnose, caused by the fungus Colletotrichum graminicola is one of the most important diseases of sorghum worldwide. The current study was aimed at assessing the potential of Trichoderma harzianum and Pseudomonas fluorescens & organic amended soil extracts invitro for environmentally friendly management of C. graminicola in sorghum. Twelve T. harzianum and ten P. fluorescence isolates were evaluated through dual culture to determine their ability to act as antagonists of C. graminicola . Among the isolates the best result was shown by Th-43 and Psf-2 isolates achieved maximum inhibition of radial growth of the test pathogen by 77.78% and 66.67%, respectively under in vitro study. The poultry manure amended soil extract was found effective in inhibiting the mycelia dry weight (26.66 %) of the test pathogen followed by tea waste (21.93%) orange peel (18.87 %) and cow urine (16.59%) than check, while least growth inhibition was obtained with cow dung (8.44%) as compared to check.

Keywords: Colletotrichum graminicola, Trichoderma harzianum, Pseudomonas fluorescens, dry weight, cow urine, cow dung

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