Abstract
Recent advances in methodology and instrumentation have made possible very close study of the movement of insecticides1 in plants, their persistence in food, fodder and soil, and their conversion to compounds more toxic or less. Labelling compounds with radioactive tracers has made it comparatively easy to follow the movement of insecticides within plants and to determine their fate and deposition. In this review the term “labelled” refers to the use of radioactive phosphorus in a chemical compound; where other labels have been used, they are named. Knowledge of the persistence of compounds or metabolites resulting from treatment with insecticides has been advanced by recent refinements in gas phase chromatography which have made possible the detection and identification of infinitesimal residues.
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