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Koomson et al



Journal of Dynamics in Agricultural Research

Available online at http://www.journaldynamics.org/jdar

Vol.3(2), pp.34-40, September 2016

Article ID: JDAR/JDYA23999675

Copyright © 2016

 

Original Research Paper

The fate of Chlorpyrifos-Ethyl 480 G/L in horticultural crops in Ghana

Koomson, C.K.1*, Owusu, E.O.2, Obeng-Ofori, D.3 ,  and Kingsford-Adaboh, R.4

1University of Education, Department of Integrated Science Education, P.O. Box 25, Winneba, Central Region, Ghana.

2Department of Animal Biology and Conservation Science, University of Ghana, Legon, Ghana.

3Crop Science Department, University of Ghana, Legon, Ghana.

4Chemistry Department, University of Ghana, Legon, Ghana.

*Corresponding Author. E-mail:charleskoomson@yahoo.co.uk.

Received 10 May, 2016; Accepted 5 September, 2016.

Abstract

This study investigated the fate of chlorpyrifos-ethyl 480 g/l in cabbage (Brassica olerecea var. capitata L.) using both field experiments and laboratory analysis. GC analysis showed that the insecticide undergoes volatilization and degradation which could reduce the concentration of the active ingredient making it less effective to control insect pests. The results revealed that the dissipation of insecticides occur through volatilization and degradation of the insecticide in the crop which may be influenced by temperature. It is therefore important that the Environmental Protection Agency and the Pesticides Technical Committee demand studies on the rate of volatilization of agrochemical as part of the bioefficacy trials done by local researchers. This will help in the determination of the correct application rates under tropical conditions that can leave a desirable amount of the agrochemical in the crop to control insect pests and diseases. It is believed that when this is done it will reduce incidence of pest resistance and pest resurgence in the country.

Keywords: Chlorpyrifos-ethyl 480gl-1 dissipation, volatilization, evaporation, degradation and bio-efficacy trials.