Photodecomposition of insecticide formulations using a sunlamp (Philippines)
1985
Calumpang, S.M.F. | Tejada, A.W. | Magallona, E.D.
Organophosphorus and carbamate insecticide formulations were evaluated of photodegradation on silica gel G coated TLC plates using a sunlamp. The order of increasing persistency is given. Statistical analysis revealed that although the half-life values differed, some insecticide had values which did not differ significantly. Photodegradation on silica gel for most of the insecticides followed first order kinetics except for dimethoate and tetrachlorvinphos photodegradation which followed second-order kinetics. Diazinon photodegradation may be a mixture of reaction orders. Partial field data on sitao and rice showed strong agreement with laboratory results
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