![]() ![]() Talc-based powder formulations of the effective antagonistic isolates of P. subtilis B49 exhibited the maximum inhibitory activity against Xam. These isolates were identified as Pseudomonas fluorescens and Bacillus subtilis based on phenotypic characteristics, biochemical properties and using 16S-23S intergenic transcribed spacer-Polymerase Chain Reaction (PCR). Among them, 21 isolates were found to inhibit the in vitro growth of Xam. In this study, 93 bacterial isolates from the rhizosphere of cotton were screened for their efficacy in inhibiting the growth of Xam in vitro. malvacearum (Xam) was evaluated under greenhouse and field conditions. The plots treated with a mixture of Pf32, Pf93 and B49 recorded the maximum yield of 1915 kg/ha and 1512 kg/ha in trial I and trial II compared to 1210 kg/ha and 987 kg/ha in the untreated control, respectively.Ībstract = "The potential of antagonistic rhizobacteria in the management of bacterial blight of cotton caused by Xanthomonas axonopodis pv. The application of a mixture of Pf32, Pf93 and B49 to seed, soil and foliage significantly reduced the bacterial blight incidence and increased the plant height, number of branches and number of bolls under field conditions. fluorescens isolates Pf32 and Pf93 and Bacillus subtilis isolate B49 survived well in the talc-based formulation for more than 90 days. ![]() subtilis (B49) were developed and evaluated individually and in combination for their efficacy in the management of bacterial blight of cotton under greenhouse and field conditions. ![]() hamatum was noticed to the tune of 50.94, 48.03 and 44.12 per cent, respectively.The potential of antagonistic rhizobacteria in the management of bacterial blight of cotton caused by Xanthomonas axonopodis pv. Per cent reduction in colony diameter (mm) of the pathogen after 3, 6 and 9 days of incubation in T. malvacearum, Trichoderma hamatum was significantly superior in per cent reduction of mycelia colony diameter (mm) of pathogen at all the incubation periods tested. Amongst the antagonist tested against Xanthomonas axonopodis pv. copper oxychloride 0.25 % + streptocycline 100 ppm sprays to the tune of 11.83 per cent (PDI) and 19.36 per cent (PI) respectively as against the unsprayed control 27.56 per cent and 45.51 per cent respectively and obtained significantly higher seed cotton yield 2567.33 kg/ha followed by carbendazim 0.1 % + streptocycline 100 ppm. ![]() Significantly low disease severity and low disease incidence were recorded in treatment T4 i.e. malvacearum | Gossypium spp | Chemicals | Bioagents ABSTRACT An experiment was carried out to see the efficacy of different chemicals and bioagents against bacterial blight disease severity (PDI) and disease incidence (PI). Dey Journal: Scientific Journal of Microbiology ISSN 2322-2948 Volume: 1 Issue: 1 Start page: 10 Date: 2012 Original page Keywords: Management | Xanthomonas axonopodis pv. ![]()
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