Unsymmetrical O-alkyl S'-butyl S-alkylthioalkyl dithiophosphates and oxidized derivatives thereof

摘要

Dithiophosphates of the general formula: <IMAGE> wherein R' is methyl or ethyl; R'' is primary or secondary C3-C4 alkyl; Q is a C1-C4 alkylene; y is 0-2; R1 is C1-C4 alkyl and aryl are novel compounds having excellent pesticidal properties against insects, mites and nematodes. O-Ethyl S'-n-propyl S-alkylthioalkyl dithiophosphates in which each alkyl group has from 1 to 3 carbon atoms, are especially outstanding as pesticides of reduced mammalian toxicity and are useful in the control of the highly pesticide resistant insects of the Order of Lepidoptera.