Organic compounds derived from urea or thiourea, insecticidal preparations on the basis of the new substances and methods of producing the substances

摘要

Compounds of the formula ##STR1## wherein A is a hydrogen atom, a halogen atom, a methyl group, or a methoxy group;PPB is a hydrogen atom, a halogen atom, a methyl group, or a methoxy group, with the proviso that A and B ar not both a hydrogen atom;P PX and Y each are an oxygen atom or a sulfur atom;PPR is a hydrogen atom, an alkyl group, a hydroxy group, an alkoxy group, an alkoxymethyl group, an acyl group, or an alkoxycarbonyl group;P PR.sub.1 is a hydrogen atom, an alkyl group, a halogen substituted alkyl group, an alkoxy substituted alkyl group, an alkylthio substituted alkyl group, a cyano substituted alkyl group, a 1- cycloalkenyl group, a benzyl group, a halogen substituted benzyl group, a hydroxy group, an alkoxy group, an acyl group, an alkoxycarbonyl group, an alkoxythiocarbonyl group, an alkylsulfonyl group, or a phenylsulfonyl group, while furthermore R and R.sub.1 together with the group ##STR2## indicated in the above formula may form a ring system; and R.sub.2 is a substituted or non-substituted phenyl group or a pyridyl group that may be substituted with halogen, with nitro, with cyano, or with halogenated alkyl. The compounds have strong insecticidal activity against a wide variety of insects and function according to a unique mechanism. Specifically, the compounds are active against insects in the larval stage and are absorbed by the larva via its stomach to interfere with the mechanism of metamorphoses that occurs in insects.