Behavior of Butachlor and Pyrazosulfuron-ethyl in Paddy Water Using Micro Paddy Lysimeters under Different Temperature Conditions in Spring and Summer

• Published in: Bulletin of environmental contamination and toxicology Vol. 89; no. 2; pp. 306 - 311
• Main Authors: Ok, Junghun, Doan, Nguyen Hai, Watanabe, Hirozumi, Thuyet, Dang Quoc, Boulange, Julien
• Format: Journal Article
• Language: English
• Published: New York Springer-Verlag 01.08.2012; Springer Nature B.V
• Subjects: Acetanilides - analysis; Ambient temperature; Aquatic Pollution; Behavior; Cereal crops; Crops, Agricultural; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Herbicides; Herbicides - analysis; Hydrology; Lysimeters; Oryza; Oryza sativa; Pollution; Pyrazoles - analysis; Pyrimidines - analysis; Rice; Seasons; Soil Science & Conservation; Spring; Summer; Temperature; Temperature effects; Waste Water Technology; Water - chemistry; Water Management; Water Pollutants, Chemical - analysis; Water Pollution Control; Pyrazosulfuron-ethyl; Butachlor; Temperature; Micro paddy lysimeter
• ISSN: 0007-4861; 1432-0800
• DOI: 10.1007/s00128-012-0700-1

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.