Vol. 7, Issue 4 (2019)
Screening of promising rhizobacterial agents for the management of Fusarium oxysporum F. sp. melongenae in brinjal plants
Author(s): Bhanothu Shiva, P Srinivas and Deepa Khulbe
Abstract: Fusarium wilt of brinjal caused by Fusarium oxysporum f. sp. melongenae is a now serious disease in eastern coastal regions of Odisha. Due to its soil inhabiting nature, this disease is very difficult to be managed by chemical fungicides. Rhizosphere soil of healthy brinjal plants was used for isolation and screening of native bacterial antagonists for screening and their promising role of biocontrol efficacy against fusarium wilt. Among 34 bacterial strains isolated from rhizoplane and rhizosphere of brinjal roots, five isolates viz. isolate-01, isolate-17, isolate-23, isolate-24 and isolate-32 were found highly inhibitory against mycelial growth of Fusarium sp., in dual cultures. Highest inhibition of radial mycelial growth of pathogen in dual culture was induced by isolate-32 (74.1%) followed by isolate-24 (71.9%). In greenhouse experiments percent disease incidence (PDI) was lower in artificially inoculated brinjal plants treated with isolate-32 (6.3%) and isolate-24 (8.7%), with percent disease reduction over control of 86% and 80.8%, respectively. These isolates also exhibited significant difference in seed germination percentage under artificial inoculation along with pathogen, highest germination percentage was recorded by isolate-32 (93%) followed by isolate-24 (91%) as compared to pathogen inoculated control (18%). The study concluded that the two native rhizobacteria isolated from root zone of healthy brinjal plants could successfully protect the brinjal plants from the lethal infection by Fusarium sp. while enhancing the germination of the treated plants.
Pages: 969-975 | 261 Views 47 Downloads
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How to cite this article:
Bhanothu Shiva, P Srinivas, Deepa Khulbe. Screening of promising rhizobacterial agents for the management of Fusarium oxysporum F. sp. melongenae in brinjal plants. Int J Chem Stud 2019;7(4):969-975.
