Control Efficacy of Ethaboxam on Chinese Cabbage Clubroot Caused by Plasmodiophora brassicae

Ethaboxam의 배추 뿌리혹병 방제효과

  • Choi, Gyung-Ja (Biological Function Research Team, Korea Research Institute of Chemical Technology) ;
  • Jang, Kyoung-Soo (Biological Function Research Team, Korea Research Institute of Chemical Technology) ;
  • Kim, Jin-Cheol (Biological Function Research Team, Korea Research Institute of Chemical Technology) ;
  • Lim, He-Kyoung (Biological Function Research Team, Korea Research Institute of Chemical Technology) ;
  • Chun, Sam-Jae (Specialty Chemicals Research Group, LG Life Sciences Ltd. R&D Park) ;
  • Kim, Dal-Soo (Specialty Chemicals Research Group, LG Life Sciences Ltd. R&D Park) ;
  • Cho, Kwang-Yun (Biological Function Research Team, Korea Research Institute of Chemical Technology)
  • 최경자 (한국화학연구원 생물기능연구팀) ;
  • 장경수 (한국화학연구원 생물기능연구팀) ;
  • 김진철 (한국화학연구원 생물기능연구팀) ;
  • 임희경 (한국화학연구원 생물기능연구팀) ;
  • 전삼재 (LG생명과학기술연구원 정밀화학연구그룹) ;
  • 김달수 (LG생명과학기술연구원 정밀화학연구그룹) ;
  • 조광연 (한국화학연구원 생물기능연구팀)
  • Published : 2005.03.31

Abstract

Ethaboxam[(RS)-N-(a-cyano-2-thenyl)-4-ethyl-2-(ethylamino)-1,3-thiazole-5-carboximide] is a novel fungicide with high level of activity against Oomycetes fungi. The control effects of ethaboxam technical and various ethaboxam formulations were investigated against P. brassicae, the causal agent of clubroot disease in Chinese cabbage. When ethaboxam was applied to infested soil, club formation caused by P. brassicae was strongly inhibited at 8.33 mg/L soil and $EC_{50}$ of ethaboxam was 2.65 mg/L soil. Five ethaboxam formulations [10% suspension concentrate (SC), 15% SC, 2% granule (GR), 5% GR, 25% wettable powder] and mixture formulation of ethaboxam and metalaxyl (3%+1% GR) exhibited good efficacy against the pathogen. 10% SC, 15% SC, and 2% GR formulations of ethaboxam showed better disease controlling efficacy on Chinese cabbage clubroot than the other formulations. The $EC_{50}$ values of 10% SC, 15% SC, and 2% GR formulations of ethaboxam were 3.72 mg AI/L soil, 1.1 mg AI/L soil, and 4.95 mg AI/L soil, respectively. Among them, soil drenching application by 15% SC formulation of ethaboxam exhibited the most in vivo antifungal activity on P. brassicae. These results indicate that ethaboxam has a high potential for the control of clubroot disease.

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