THERMAL AND PHOTODECOMPOSITION OF FENITROTHION AND MALATHION INSECTICIDES

Document Type : Original Article

Author

Central Laboratory of Residue Analysis of Pesticides and Heavy Metals in Food

Abstract

The effect of exposure to heat,  UV-rays and sunlight on the degradation of fenitrothion and malathion were studied. It was found that fenitrothion insecticide residues was more persistence than malathion insecticide residues and both showed progressive loss as temperature and prolongation of exposure period increased, this indicates that the interval between successive sprays should be shorter at high temperature and vice versa. Photodegradation with UV-rays was positively correlated with exposure  period  and  chemical  structure  of  insecticide,   malathion
degraded faster than fenitrothion in this respect. Sunlight was more effective than UV-rays in accelerating the photodecomposition of fenitrothion and malathion residues. 

Keywords

Journal of Plant Protection and Pathology
Volume 2, Issue 11
November 2011
Pages 919-924

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