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

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)
Publication Information
The Korean Journal of Pesticide Science / v.8, no.3, 2004 , pp. 175-183 More about this Journal
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.
Keywords
adsorption; behaviour; EK-5439; half-life; overflowing; vertical migration;
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