Endothal (Disodium 3,6-endoxohexahydrophthalate) 
Radioactive tracer studies show that most of the endothal degradation 
occurs in the moist soil within 7-10 days and that the cl4g, produced is 
then taken up by the plant and incorporated into plant metabolites (Freed 
et al., 1958a; Montgomery et al., 1959b). 
Endothion (2-Dimethoxyphosphorylthiomethyl-5-methoxy-4-pyrone) 
Endothion was applied to several species of insects and the degree 
of penetration and metabolism was studied. Three metabolites were isolated 
but the quantities were insufficient to permit rigorous identification 
(Touron and Hascoet, 1964). 
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