Behavior of sprayed tricyclazole in rice paddy lysimeters

Thai, Phong Khanh, Nhung, Dang Thi Tuyet, Yamazaki, Kenichi, Takagi, Kazuhiro, & Watanabe, Hirozumi (2009) Behavior of sprayed tricyclazole in rice paddy lysimeters. Chemosphere, 74(8), pp. 1085-1089.

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The behavior of sprayed tricyclazole in rice paddy lysimeters was studied. Tricyclazole residues were measured from rice leaves and paddy water after tricyclazole spraying in paddy lysimeters. The rate of photolysis and hydrolysis of tricyclazole on the surface of rice leaves was also determined in a laboratory experiment. Tricyclazole was extracted from leaf and water samples and determined by liquid chromatography with UV or mass spectrometry. The hydrolysis half-lives of tricyclazole on rice leaves were 11.9 and 5.1 d for the formulated product and standard, respectively. The photolysis half-lives were longer, 16.4 d for the formulated product and 20.9 d for the standard. In the paddy lysimeter, tricyclazole dissipation on leaves involved either biphasic first-order kinetics or single-phase first-order kinetics, depending on the rainfall pattern. Half-lives of tricyclazole on lysimeter rice leaves were from 3.0 to 5.7 d. The dissipation of tricyclazole in paddy water followed single-phase first-order kinetics with half-lives ranging from 2.1 to 5.0 d.

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ID Code: 88975
Item Type: Journal Article
Refereed: Yes
Keywords: Half-life, Hydrolysis, Lysimeter, Photolysis, Wash-off
DOI: 10.1016/j.chemosphere.2008.10.050
ISSN: 0045-6535
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Deposited On: 13 Oct 2015 05:01
Last Modified: 22 Oct 2015 04:03

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