Level and Fate of Etoxazole in Green Bean (Phaseolus vulgaris)

  • Farag Malhat
  • Amal Hassan


The objective of this study was to estimate the total etoxazole residues balance (residue in pods, leaves and soil under the treated plant) in green bean and for identification of the degradative metabolites of etoxazole in soil under the treated plant. The results showed half life (t1/2) values of 3.13, 2.73 and 2.11 days for etoxazole in green bean pods, leaves and soil, respectively. According to the maximum residue limits (MRL) the pre harvest intervals (PHI) of etoxazole on green bean pods was 4-days after the treatment. The results of GC–Ms analysis of soil extracts under the treated plant showed that, at zero time unchanged etoxazole was found. The proportion of etoxazole in soil extracts detected decreased with the time. GC–Ms analysis of soil extracts show the presence of compound having the formula of C14H23NO2 which was suggested to be 2-amino-2(4-tert-butyl-2-ethoxyphenyl) ethanol. The other founded compound has the formula C13H18O3 and suggested to be 4-tert-butyl-2-ethoxybenzoic acid.


Etoxazole Residues Soil Green bean 


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Pesticide Residues and Environmental Pollution, Central Agricultural Pesticide LaboratoryAgriculture Research CenterDokki, GizaEgypt

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