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Residual Pattern of Chlorothalonil, Indoxacarb, Lufenuron, Metalaxyl and Methomyl during the Cultivation Periods in Chinese Cabbage  

Ko, Kwang-Yong (Department of Agricaltural Chemistry, Chungnam National University)
Kim, Sung-Hun (Moghu Research Center Ltd.)
Jang, Young-Hee (Department of Agricaltural Chemistry, Chungnam National University)
Lee, Kyu-Seung (Department of Agricaltural Chemistry, Chungnam National University)
Publication Information
The Korean Journal of Pesticide Science / v.12, no.1, 2008 , pp. 34-42 More about this Journal
Abstract
In order to know the residual pattern of some pesticides and predict to the degradation period until below MRL, we experimented chlorothalonil, indoxacarb, lufenuron, metalaxyl and methomyl for Chinese cabbage. They were frequently detected pesticides in Chinese cabbage by NAQS (National Agricultural product Quality management Service) monitoring survey. In this experiment, we sprayed those pesticides 10days before harvest and analyzed 0, 1, 2, 3, 5, 7, 10 day samples to establish logical equation and to calculate $DT_{50}0$. During the cultivating period, the residue amount of chlorothalonil was changed from $55.58\;mg\;kg^{-1}$ (0 day) to $20.08\;mg\;kg^{-1}$ (10 day), $DT_{50}$ was 7.45 days, indoxacarb was $7.85\;mg\;kg^{-1}$ (0 day) to $1.46\;mg\;kg^{-1}$ (10 day), and 4.2 days, lufenuron was $1.57\;mg\;kg^{-1}$ (0 day) to $0.49\;mg\;kg^{-1}$ (10 day), and 5.85 days, metalaxyl was $8.12\;mg\;kg^{-1}$ (0 day) to $0.10\;mg\;kg^{-1}$ (10 day), and 175 days, and methomyl was $11.51\;mg\;kg^{-1}$ (0 day) to $0.80\;mg\;kg^{-1}$ (10 day), and 2.42 days at single dose application, respectively. The $DT_{50}$ of double amount in those pesticides were 9.05 days in chlorothatonil, 7.09 days in indoxacarb, 8.82 days in lufenuron, 3.32 days in metalaxyl, and 2.72 days in methomyl, respectively.
Keywords
Pesticide residue; Chlorothalonil; Indoxacarb; Lufenuron; Metalaxyl; Methomyl; Biological half life; Chinese cabbage;
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Times Cited By KSCI : 5  (Citation Analysis)
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