Abstract
IN VITRO EVALUATION OF BIOAGENTS AGAINST PHOMOPSIS VEXANS (SACC. & SYD.) HARTER, CAUSING STEM BLIGHT AND FRUIT ROT OF BRINJAL (SOLANUM MELONGENA L.)
M. R. Thesiya*, K. B. Rakholiya, M. R. Shekhada and P. B. Patel
ABSTRACT
The Brinjal (Solanuum melongena L.) – “King of Vegetables” is principal vegetable crops grown in the tropical and subtropical areas. Stem blight and fruit rot of brinjal is considered to be the most serious and wide spread disease. The efficacy of three fungal and two bacterial bioagents viz, Trichoderma viride, Trichoderma harzianum, Trichoderma virens, Bacillus subtilis and Pseudomonas fluorescens were evaluated in vitro condition against Phomopsis vexans. In the dual culture assay, results revealed that all the tested bioagents were significantly inhibited mycelial growth of P. vexans, over untreated control. Among the effective bioagents, highest average mycelial growth inhibition was recorded in T. virens (49.11%) that was found at par with T. viride (47.32%) followed by P. fluorescens (43.05%), T. harzianum (38.82%) and B. subtilis (31.47%) were also found moderately effective against the pathogen. All the antagonists suppressed the formation of pycnidia.
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