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Field tolerance of pesticides in the strawberry and comparison of biological half-lives estimated from kinetic models  

Park, Dong-Sik (Division of Biological Environment, Kangwon National University)
Seong, Ki-Young (Division of Safety Analysis, Research & Experiment Institute, National Agricultural Products Quality Management Service)
Choi, Kyu-Il (Division of Safety Analysis, Research & Experiment Institute, National Agricultural Products Quality Management Service)
Hur, Jang-Hyun (Division of Biological Environment, Kangwon National University)
Publication Information
The Korean Journal of Pesticide Science / v.9, no.3, 2005 , pp. 231-236 More about this Journal
Abstract
This study was conducted to determine the amounts of pesticide residues after treatment of criterion dose with 4 pesticides(tolclofos-m, folpet, procymidone, and triflumizole) under cultivated period and to compare the biological half-life of pesticides with 6 kinetic models(first, zero and second order kinetics, power function, elovich and parabolic model) and to establish proposed field tolerance using biological half-lives. Recovery of 4 pesticides form strawberry was ranged from 85.1 to 105.5%. For all of 4 pesticides, dissipation rate was over 73% at 5 days after application. Among 6 kinetic models, first order kinetic model (FO) was best fit to describe the relationship between residual pattern of pesticides and time. Therefore, half-lives were calculated by FO for establishing the field tolerance. These results showed that half-life should be calculated by comparative best fit kinetic model and field tolerance can help to prevent unacceptable agricultural products from marketing. It is good for both consumers and farmers having safe agricultural products and financial benefits, respectively.
Keywords
biological half-life; field tolerance; kinetic model; pesticide residues;
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