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 |
Five rhizospheric bacterial cultures and cell free culture filtrates (CFs) (one strain of Gluconacetobacter diazotrophicus (35-47), two strains of Azotobacter chroococcum viz. AVK-51, HT-54: two strains of Bacillus spp. viz., RKB-91, RKB-65) were evaluated for larval mortality and egg hatching against rice root-knot nematodes (Meloidogyne gramincola) at CCS HAU Hisar. The obtained data revealed that, among five bacterial isolates the bacillus strain of RKB-91 (84.67% & 81.00%) were the most effective bacteria at S/2 concentration in both cultures and CFs respectively at 48 hr, followed by Bacillus Sp. RKB-65. The lowest mortality (05.00%) was observed in water mixture (control). whereas, these bacteria achieved the highest mortality percentages by more than 80%. Results also indicated that among all bacterial strains Bacillus Sp. RKB-91 showed most inhibitory effect (28.0 and 31.00) of egg hatching at S/2 concentration followed by bacillus Sp. RKB-65 (36.33 and 41.00) and Azatobacter Spp. in both cultures and cell free culture filtrates after 10 days respectively.. The maximum egg hatching was recorded in water (95%). It is revealed that all three factors viz, cultures, cell free culture filtrates and their concentrations significantly affected mortality and hatching individually.
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