We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Behavior of Herbicide Pyrazolynate and its Hydrolysate in Paddy Fields after Application.
- Authors
Kubo, Takuya; Ohno, Masaki; Nagasawa, Shunsuke; Kose, Tomohiro; Kawata, Kuniaki
- Abstract
Behavior of the herbicide pyrazolynate, 4-(2,4-dichlorobenzoyl)-1,3-dimethylpyrazol-5-yl p-toluenesulfonate, in paddy water and soil after application to paddy fields was investigated to evaluate the hydrolyzation to destosyl pyrazolynate (DTP), 4-(2,4-dichlorobenzoyl)-1,3-dimethyl-5-hydroxypyrazole. The respective maximum concentrations of pyrazolynate and DTP were 440-1,240 and 200-260 μg/L, respectively, in the paddy water, and 610-860 μg/kg dry and 460-730 μg/kg dry in the paddy soil. The applied pyrazolynate was drained from the paddy fields as DTP. The runoff ratios of DTP from the paddy fields were calculated as 19 % ± 14 %. The respective mean values of the half-lives of pyrazolynate and DTP were 0.87 ± 0.091 and 17 ± 1.4 days in the paddy water and 2.2 ± 0.70 and 26 ± 2.1 days in the paddy soil, respectively.
- Subjects
HERBICIDES; PYRAZOLYL compounds; HYDROLYSIS; RICE farming; RICE soils; RUNOFF
- Publication
Bulletin of Environmental Contamination & Toxicology, 2012, Vol 89, Issue 5, p985
- ISSN
0007-4861
- Publication type
Article
- DOI
10.1007/s00128-012-0793-6