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Biocontrol Efficacy of Formulated Pseudomonas chlororaphis O6 against Plant Diseases and Root-Knot Nematodes
Published online April 26, 2018
© 2018 The Korean Society of Plant Pathology.

Hyo Song Nam1, Anne J. Anderson2, and Young Cheol Kim3*

1Jeonnam Bioindustry Foundation, BioControl Research Center, Gokseong 57510, Korea
2Department of Biological Engineering, Utah State University, Logan, UT 84322-4105, USA
3Department of Applied Biology, Chonnam National University, Gwangju 61186, Korea
Correspondence to: Phone) +82-62-530-2071, FAX) +82-62-530-0208
AJ Anderson
YC Kim
Received December 16, 2017; Revised January 13, 2018; Accepted February 28, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Commercial biocontrol of microbial plant diseases and plant pests, such as nematodes, requires field-effective formulations. The isolate Pseudomonas chlororaphis O6 is a Gram-negative bacterium that controls microbial plant pathogens both directly and indirectly. This bacterium also has nematocidal activity. In this study, we report on the efficacy of a wettable powder-type formulation of P. chlororaphis O6. Culturable bacteria in the formulated product were retained at above 1 × 108 colony forming units/g after storage of the powder at 25 °C for six months. Foliar application of the diluted formulated product controlled leaf blight and gray mold in tomato. The product also displayed preventative and curative controls for root-knot nematode (Meloidogyne spp.) in tomato. Under laboratory conditions and for commercially grown melon, the control was at levels comparable to that of a standard commercial chemical nematicide. The results indicated that the wettable powder formulation product of P. chlororaphis O6 can be used for control of plant microbial pathogens and root-knot nematodes.
Keywords : biological control, hydrogen cyanide, nematicide, root-knot nematode

April 2018, 34 (2)
  • DOAJ