1Faculty of Agronomy, University of Agriculture and Forestry, Hue University, 102 Phung Hung, Hue, Vietnam
2Research Are 2 “Land use and Governance” Leibniz Centre for Agricultural Landscape Research (ZALF), Müncheberg, Germany
3Department of Educational Management, HUAF, Hue University, Vietnam
Faculty of Agronomy, University of Agriculture and Forestry (HUAF), Hue University, 102 Phung Hung, Hue, Vietnam
*Corresponding author's e-mail: lecuong@huaf.edu.vn
Online published on 27 September, 2019.
Stem rot of groundnut caused by Sclerotium rolfsii, seriously damages groundnut production in central Vietnam. Biological control is a promising strategy for sustainable groundnut cultivation. In this study, indigenous bacteria were isolated from the rhizosphere of groundnut and tested for fungal inhibition against S. rolfsii in vitro and disease control under net house condition. Geneticdiversity of isolated bacterial population was evaluated by BOX-PCR and 16SrDNA sequences. Bacterial strains that showed high disease control in net house were evaluated under natural conditions in farmer fields. The antifungal mechanism of the best bacterial strain was identified. Results of the study showed that the antagonistic bacterial population in groundnut rhizosphere is separated in three bacterial genera including Bacillus, Pseudomonas and Burkholderia. One bacterial strain which produces 2, 4-DAPG reduced stem rot of groundnut caused by S. rolfsii and increased yield from 20.3 to 26.3% compared to the control.
Arachis hypogaea, Bacteria, Groundnut, Scleortium rolfsii
