The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
권호 표지

Selectivity and behaviour of EK-5439 in the soil as a candidate for rice herbicide

신규 제초제 후보 화합물 EK-5439의 선택성 및 토양 중 행동특성

  • Hwang, I.T. (Korea Research Institute of Chemical Technology) ;
  • Hong, K.S. (Korea Research Institute of Chemical Technology) ;
  • Lee, B.H. (Korea Research Institute of Chemical Technology) ;
  • Kim, H.R. (Korea Research Institute of Chemical Technology) ;
  • Jeon, D.J. (Korea Research Institute of Chemical Technology) ;
  • Cho, K.Y. (Korea Research Institute of Chemical Technology)
  • 황인택 (한국화학연구원 생물화학연구부) ;
  • 홍경식 (한국화학연구원 생물화학연구부) ;
  • 이병회 (한국화학연구원 생물화학연구부) ;
  • 김형래 (한국화학연구원 생물화학연구부) ;
  • 전동주 (한국화학연구원 생물화학연구부) ;
  • 조광연 (한국화학연구원 생물화학연구부)
  • Published : 2004.09.30
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Abstract

The characteristics of the experimental compound EK-5439 [3-Chloro-2-[4-chloro-2-fluoro-5-(5-methyl-3-phenyl-4,5-dihydroisoxazol-5-yl-methoxy)-phenyl]-4,5,6,7-tetrahydro-2H-indazole] was investigated to characterize as a new herbicide to use in rice field. The selectivity between rice and barnyardgrass was very good when treated from 0 to 4 days after seeding under soil application. In the overflowing experiment, herbicidal efficacy of EK-5439 was stabilized 12 hrs after application. Vertical migrations in submerged paddy soil of EK-5439 and oxadiazon were equally observed below a soil depth of 1 cm under 5 cm/day leaching condition. Half-lives for herbicidal efficacy of EK-5439 and oxadiazon were 6.1, and 9.6 days, respectively, under submerged paddy condition. EK-5439 showed rapid adsorption to the soil clay, such as bentonite.

신규한 벼 제초제 후보화합물 EK-3439 [3-chloro-2-[4-chlore-2-fluoro-5-(5-methyl-3-phenyl-4,5-dihydroisoxazol-5-yl-methoxy)-phenyl]-4,5,6,7-tetrahydro-2H-indazole]의 실용화를 위한 선택성과 토양 중 행동특성을 조사하였다. 직파 벼와 피 간의 선택성은 파종 후 4일 이내에 처리할 경우에 높게 나타났으며, 처리 후 12시간이 경과되면 환수되어도 제초효과의 변동이 일어나지 않았다. EK-5439와 oxadiazon은 모두 토양 중 이동 폭이 5cm/일의 누수 조건에서 1 cm 이내 이었다. EK-5439의 잔효 반감기는 6.1일 이었고, 동일 조건에서 oxadiazon은 9.6일 이었다. 토양 점토광물 bentonite에 의한 흡착은 oxadiazon에 비하여 상대적으로 큰 것으로 나타났으며 흡착력을 간단하게 평가하는 새로운 방법을 적용하였다.

Keywords

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