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  DOI Prefix   10.20431


 

International Journal of Advanced Research in Chemical Science
Volume 4, Issue 12, 2017, Page No: 7-23

Effect of Different Soil Treatments on Dissipation of Chlorantraniliprole and Dehydrogenase Activity Using Experimental Modeling Design

Mohamed E.I.Badawy1,Ahmed F.El-Aswad2,Maher I.Aly3,Mohamed R.Fouad4

Department of Pesticide Chemistry and Technology, Faculty of Agriculture, 21545-El-Shatby, Alexandria University, Alexandria, Egypt.

Citation :Mohamed E.I.Badawy,Ahmed F.El-Aswad,Maher I.Aly,Mohamed R.Fouad, Effect of Different Soil Treatments on Dissipation of Chlorantraniliprole and Dehydrogenase Activity Using Experimental Modeling Design International Journal of Advanced Research in Chemical Science 2017,4(12) : 7-23

Abstract

Laboratory studies were conducted to investigate the dissipation behavior of chlorantraniliprole (CAP) insecticide in two common types of Egyptian soils (Alluvial and Calcareous) with different conditions and treatments. The side effect of CAP was also tested on soil dehydrogenase (DHase) activity. The CAP was analyzed by HPLC and its dissipation followed the first order kinetics. Type of soil, amendment (wheat straw), temperature, sterilization and time of incubation were selected to design the experiments by Minitab software. The residues dissipated below the limit of quantification (LOQ) of 0.074μg after 60 days of the application at 50 μg/g soil in both soils. The half-life (t0.5) value was ranged from 7.52 to 11.55 days in Alluvial soil (A) and from 9.01 to 11.63 days in Calcareous soil (B). The modeling showed that the experimental data could be adequately adapted in a second-order polynomial model with a multiple regression coefficient r2 ? 0.70 for the prediction of dissipation and t0.5. The result proved that the enzyme activity was significantly decreased in all treatments compared with the controls at 1 and 3 days of incubation then it was gradually increased at 7, 10, 15 and 30 days of incubation.


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