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Updated: May 21, 2026

Integrated Field Lysimetry and Porewater Sampling for Evaluation of Chemical Mobility in Soils and Established Vegetation
Published on: July 4, 2014
Behavior of butachlor and pyrazosulfuron-ethyl in paddy water using micro paddy lysimeters under different
Junghun Ok1, Nguyen Hai Doan, Hirozumi Watanabe
1Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Tokyo, 183-8509, Fuchu, Japan.
Abstract:
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.
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