Biological control of Phomopsis leaf blight of brinjal (Solanum melongena L.) with combining phylloplane and rhizosphere colonizing beneficial bacteria

Publication date: Available online 10 May 2016 Source:Biological Control Author(s): Rohini, H.G. Gowtham, P. Hariprasad, S. Brijesh Singh, S.R. Niranjana Beneficial phylloplane colonizing bacteria (PCB) and rhizosphere colonizing bacteria (RCB) were evaluated individually and in combinations for plant growth promotion and control of Phomopsis leaf blight of brinjal (Solanum melongena L.). Bacteria from the leaf surface of brinjal plants were isolated and screened, and four PCBs were selected based on their ability to colonize phylloplane and inhibit the growth of Phomopsis vexans. All PCB and RCB strains were characterized for their beneficial traits and their leaf and root colonizing ability were confirmed through SEM. Under greenhouse conditions, individual applications such as seed treatment with Pseudomonas putida Has-1/c (RCB) and foliar application of Bacillus subtilis Br/ph-33 (PCB) significantly increased the plant growth and leaf surface area, respectively. Among 16 combinations of PCB and RCB tested, seed treatment with P. fluorescens 2apa-pf followed by foliar application of B. subtilis Br/ph-33 significantly increased root length (6.3 cm) and shoot length (23.2 cm), fresh weight (2.51 g) and dry weight (0.373 g) of seedling. Individual application of PCB strains recorded significant decrease in disease incidence and severity over control. Among various combinations tested, Has-1/c + Br/ph-11 significantly reduced the disease incidence (18.0%) and se...
Source: Biological Control - Category: Biology Source Type: research
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