ISSN: 0973-7510

E-ISSN: 2581-690X

P. Suneeta , K. Eraivan Arutkani Aiyanathan and S. Nakkeeran
Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore-641003, Tamil Nadu, India.
J. Pure Appl. Microbiol., 2016, 10 (3): 2099-2111
© The Author(s). 2016
Received: 17/07/2016 | Accepted: 06/09/2016 | Published: 30/09/2016
Abstract

A survey was conducted to assess the incidence of wilt of Gerbera caused by Fusarium oxysporum f. sp. gerberae (FOG) in Nilgiris and Salem districts of Tamil Nadu during 2013-2014. The wilt incidence ranged from 10.11% to 19.81% in nine varieties Donavan, Valletta, Alamo, Bellwater, Avimaria, Blessing, Atletico, Farida and Dalma. 26 isolates were screened for the management of disease, of which, Ochrobactrum spp. (BSD5), B. subtilis (PSB5) and B. megaterium (BmTNAU1) isolates showed highest antagonistic activity against FOG. 9 isolates of Bacillus spp. were studied for the presence of biosynthetic genes of antimicrobial peptides (AMPs). The effective biocontrol agents were applied through root dipping and soil drenching @ 5ml/L either individually or in consortia. Seedling dip and soil drenching @ 0.5% with PSB5+BSD5+BmTNAU1 resulted in reduced disease incidence, enhanced plant height, root length and flower yield of Gerbera.

Keywords

GC-MS, Fusarium, Formulations, Gerbera, Bacillus spp.

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© The Author(s) 2016. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.