BIOEFFICACY OF Bacillus subtilis AGAINST FOLIAR FUNGAL DISEASES OF TOMATO
Publication Date : 08/02/2016
Pot culture experiment was conducted during kharif 2014 to study the efficacy and growth promoting ability of Bacillus subtilis against powdery mildew (Leviellula taurica) and early blight (Alternaria solani ) of tomato. In pot culture experiment B. subtilis tested for its bioefficacy against early blight and powdery mildew diseases of tomato through different methods viz., seed treatment, seedling dip, foliar spray and soil application method. In seed treatment method, treatment involving B. subtilis at 8 g/kg of seed was most superior in promoting the growth and reducing the disease severity compared to other treatments. In seedling dip method, B. subtilis at 15 g/l of water recorded maximum number of branches, fruits and fruit weight per plant followed by B. subtilis at 10g/l when compared to other treatments. The results of present investigation revealed that foliar spray of B. subtilis at 10g/l of water sprayed for four times at 15,40, 65and 90 DAS recorded the less disease severity and also promote growth of the plants. In soil application method, combined application of FYM (50 g) + B. subtilis (4.00 g)/ pot was the best followed by neem cake (25 g) + B. subtilis (4.0 g)/ pot when compared to other treatments. Among all the methods foliar spray method was the most effective in reducing the disease severity of powdery mildew and early blight whereas, soil application of bioagent with organic amendments had increased growth of plant.
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