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 |
In this study, three endophytic bacteria including two Gram +ve and one Gram -ve, were evaluated for suppression of sheath blight disease caused by Rhizoctonia solani in paddy. The endophytic bacteria tested were Bacillus subtilis strain TRO4, B. subtilis strain CLO5 and Pseudomonas cichorii strain TLO7. The experiments were conducted under pot culture conditions in paddy var. MTU-7029 during Kharif 2021 and the treatments were: T1- un-inoculated (control), T2- pre-challenged in soil with the pathogen (R. solani), T3- pathogen pre-challenged + seed treatment with B. subtilis strain TRO4, T4- pathogen pre-challenged + seed treatment with B. subtilis strain CLO5 and T5- pathogen pre-challenged + seed treatment with P. cichorii strain TLO7 and T6- pathogen pre-challenged + Carbendazim (2 g/kg). There were four replications. The observations such as seed germination, disease occurrence, plant growth, root architecture, chlorophyll content and peroxidase activity in leaf tissues were recorded. The results showed the endophytic bacteria were found to be effective in enhancing the plant growth and reducing disease occurrence at par with chemical fungicide. The root growth parameters were found to be higher in pathogen pre-challenged and seeds treated with B. subtilis CLO5 (T4). The average number of lesions/plant and length of lesions (cm)/plant was found lower in (T4) and the corresponding value was 2. Considering the parameters of enhanced seed germination, induction of root growth and suppression of sheath blight disease, the seed priming with endophytic bacteria, B. subtilis strain CLO5 is a promising strategy for Sheath blight disease management in paddy.
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