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

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)
Publication Information
The Korean Journal of Pesticide Science / v.9, no.1, 2005 , pp. 81-87 More about this Journal
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.
Keywords
ethaboxam; Plasmodiophora brassicae; clubroot; antifungal activity;
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