| Abstract: | Original results of analyses of residues of trichlorfon and fenthion and its metabolites following application of commercial products to cattle, sheep and pigs, together with results taken from the literature are compared. Despite the use of higher dose rates of trichlorfon, residues are lower than those of fenthion after dermal application. On the other hand, the residues of trichlorfon that occur in the animals following oral application briefly approach the theoretical maximum level in the tissues. The results are discussed in relation to the physical and chemical properties of the pesticides and their metabolites. |
