Research in Plant Disease 2008;14(1):43-50.
Published online April 30, 2008.
잔디 갈색퍼짐병(Large patch)의 생물학적 방제를 위한 길항미생물의 선발과 효력 검정
정우철, 신택수, 김봉수, 임재성, 이재호, 김진원
Efficacy of Antagonistic Bacteria for Biological Control of Rhizoctonia Blight (Large patch) on Zoysiagrass
Woo Chul Jung, Taek Su Shin, Bong Su Kim, Jae Seong Im, Jae Ho Lee, Jin Won Kim
Rhizoctonia blight (large patch) caused by Rhizoctonia solani AG2-2 is one of the major diseases on zoysiagrass in golf courses. In this study, anatgonistic bacteria to R. solani AG2-2 were selected in vitro tests using confrontation bioassay and triple layer agar diffusion method. The most active bacteria, Bacillus subtilis CJ-9 were tested for controlling large patch in pots. Relative Performance Indies (RPI) was used as a criterion for the selection of potential biocontrol agent. B. subtilis CJ-9 showed resistance to major synthetic agrochemicals used in golf course. In field tests at golf course, B. subtilis CJ-9 was more effective in suppression of large patch severity and population development of R. solani AG2-2 in soil than chemical fungicides. B. subtilis CJ- 9 could be an alternative to chemical fungicides for eco-friendly management of large patch on zoysiagrass.
Key Words: Biological control, Bacillus subtilis CJ-9, Rhizoctonia blight (Large patch), Rhizoctonia solani AG2-2, Zoysiagrass
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