Three isomers of N, N-diethyltolylacetamides were synthesized and eval
uated against Aedes aegypti and Culex quinquefasciatus for repellency
and with mice for LD50, as an indicator of mammalian toxicity. Of thes
e, N, N-diethyl-p-tolylacetamide (DEPTA) showed comparatively better r
epellency against C. quinquefasciatus. All the compounds showed higher
repellency against C. quinquefasciatus than Ae. aegypti. In addition,
N, N-diethyl-m-tolylacetamide (DEMTA) was found to be least toxic to
mice.