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 |
Four bacterial biocontrol agents (Pseudomonas fluorescens strain 1, strain 2, strain 3 and Bacillus subtilis strain 1) and six botanicals {Neem (Azadirachata indica), Lantana (Lantana camera), Calotropis (Calotropis procera), Tulasi (Ocimum sanctum), Onion bulb (Allium cepa), Garlic glove (Allium sativum)} were evaluated in vitro against Alternaria macrospora causing leaf spot of cotton. All the treatments significantly inhibited mycelial growth of the test fungus over untreated control. Among different bacterial biocontrol agents, B. subtilis strain caused 51.68% inhibition with 1.73cm radial growth of A. macrospora followed by P.f strain 1, P.f strain 3 and P.f strain 2 with radial growth and inhibition of A. macrospora 2.08 cm, 41.89%; 2.15 cm, 39.94% and 2.45 cm, 31.56% respectively. Among botanicals, neem leaf extract was superior to other treatments with 2.83 cm radial growth and 68.52% inhibition of A. macrospora followed by garlic clove with mean radial growth 2.84 cm and 68.40% inhibition of A. macrospora compared to control (9.0 cm).
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