Behavior of bromobutide in paddy water and soil after application.
Behavior of the herbicide bromobutide, (RS)-2-bromo-N-(α,α-dimethylbenzyl)-3,3-dimethylbutyramide, in paddy water and soil after application to paddy fields was investigated to evaluate the degradation to bromobutide-debromo, N-(α,α-dimethylbenzyl)-3,3-dimethylbutyramide, and runoff of the herbicide. The respective maximum concentrations of bromobutide and the metabolite were 1,640–2,230 and 11.1–15.8 μg/L in the paddy water, and 2,210–4,140 μg/kg dry and 74–119 μg/kg dry in the paddy soil, respectively. The runoff ratios of the applied bromobutide from the paddy fields were calculated as 28 ± 16%. The respective mean values of the half-lives of bromobutide in the paddy water and the soil were 2.7 ± 0.34 days and 6.9 ± 2.6 days, respectively.
Faculty of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, 265-1 Higashijima, Akiha-ku, Niigata, Niigata 956-8603, Japan.
Masayuki
M
Morohashi
Shunsuke
S
Nagasawa
Nami
N
Enya
Kazuyuki
K
Suzuki
Tomohiro
T
Kose
Kuniaki
K
Kawata
D000383:Agriculture; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry*; D006540:Herbicides / Q000032:analysis / Q000737:chemistry*; D006842:Hydrocarbons, Brominated / Q000032:analysis / Q000737:chemistry*; D007700:Kinetics; D012275:Oryza; D012987:Soil / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
D006540:Herbicides; D006842:Hydrocarbons, Brominated; D012987:Soil; D014874:Water Pollutants, Chemical; C572217:bromobutide