Behavior of butachlor and pyrazosulfuron-ethyl in paddy water using micro paddy lysimeters under different temperature conditions in spring and summer.
The behavior of butachlor and pyrazosulfuron-ethyl in paddy water was investigated using micro paddy lysimeters with prescribed hydrological conditions under ambient temperature in spring and summer for simulating two rice crop seasons. Although they were not significantly different, the dissipation of both herbicides in paddy water in the summer experiment was faster than in the spring experiment. The half-lives (DT(50)) in paddy water for spring and summer experiments were 3.2 and 2.5 days for butachlor, and 3.1 and 1.6 days for pyrazosulfuron-ethyl, respectively.
Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Tokyo, 183-8509, Fuchu, Japan.
Junghun
J
Ok
Nguyen Hai
NH
Doan
Hirozumi
H
Watanabe
Dang Quoc
DQ
Thuyet
Julien
J
Boulange
D000083:Acetanilides / Q000032:analysis*; D018556:Crops, Agricultural; D006540:Herbicides / Q000032:analysis*; D012275:Oryza; D011720:Pyrazoles / Q000032:analysis*; D011743:Pyrimidines / Q000032:analysis*; D012621:Seasons; D013696:Temperature; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
D000083:Acetanilides; D006540:Herbicides; D011720:Pyrazoles; D011743:Pyrimidines; D014874:Water Pollutants, Chemical; D014867:Water; C433343:ethyl 5-(4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl)-1-methylpyrazole-4-carboxylate; C054409:butachlor