| 잔디 갈색퍼짐병(Large patch)의 생물학적 방제를 위한 길항미생물의 선발과 효력 검정 |
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정우철, 신택수, 김봉수, 임재성, 이재호, 김진원 |
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| Efficacy of Antagonistic Bacteria for Biological Control of Rhizoctonia Blight (Large patch) on Zoysiagrass |
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Woo Chul Jung, Taek Su Shin, Bong Su Kim, Jae Seong Im, Jae Ho Lee, Jin Won Kim |
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| Abstract |
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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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