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 |
Studies were undertaken to evaluate the plant extracts, fungicides and bio-agents against early blight disease of tomato caused by Alternaria solani under in vitro and vivo conditions. Among the four evaluated plant extracts against A. solani, neem leaf extract at 15% (w/v) was found to be most effective in inhibiting the mycelial growth of the pathogen with inhibition of 52.36 per cent, followed by combination of garlic clove and green chilli extract with the inhibition of 50.42 per cent. In case of evaluated fungicides, mancozeb 75WP at 0. 2% found to be most effective, followed by hexaconazole 4% and zineb 68% (0.2%) with the per cent inhibition of 72.55% and 67.17% respectively. Trichoderma viride was found to be most superior against A. solani with the maximum mycelial inhibition of 37.49% among the bio-agents. Among different treatments, viz., plant extracts, fungicides and bio-agents under field conditions mancozeb 75WP at concentration of 0.2% was found to be most effective in managing the early blight disease with least per cent disease intensity of 20.46 per cent and 83.28 per cent decrease in disease over the control. This reduction of disease was reflected in terms of yield i.e maximum yield was also recorded from the same treatment (18.5 K/plot) with 51.63 per cent increase in yield over the control plot.
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