National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Banded Leaf and Sheath Blight (BSBL) of maize caused by Rhizoctonia solani f. sp. sasakiiExner is one of the devastating soil-borne disease of maize in India. An experiment was conducted to evaluate the effect of botanicals and bio-control agentin vitro and in situ which led to give direction to manage the pathogen in ecofriendly manner. The antagonistic effect of Trichoderma harzianum was assayed in vitro by employing dual culture method, which was found effective in the inhibition of mycelial growth (61.1 %) of Rhizoctonia solani. Five botanicals viz., Neem (Azadirachta indica), Garlic (Allium sativum), Tulsi (Ocimum tenuiflorum), Bhang (Cannabis sativa) and Onion (Allium cepa) each @ 5, 10 and 15 % were evaluated in vitro against R. solani following poisoned food technique. Among all the plant extracts tested, garlic was found highly effective in reducing the radial growth of R. solani i.e., 62.67 % followed by neem (61.93 %), tulsi(60.00 %), onion (48.33 %) and least by bhang (42.85 %) at 15 % concentration. Carbendazim 50 WP as treated check was tested @ 0.1, 0.2 and 0.3 % concentration, which recorded excellent inhibitory activity against R. solani (100 %). The botanicals and Trichoderma harzianum found effective in vitro were tested as foliar spray, soil treatment and seed treatment respectively against banded leaf and sheath blight of maize under field conditions during kharif season 2019. Among all the treatments, soil treatment with Trichoderma harzianum was observed superior over other treatments giving maximum reduction (63.30 %) in disease severity followed by neem (66.16 %), garlic (67.67 %), tulsi(68.19 %), onion (69.25 %) and bhang (71.08 %) as compared to treated check i.e., 40.26 %. Trichoderma harzianum has given maximum increase in grain yield (4.44 t/ha) and 100 grains weight (36.03 g).
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