N-vinylimidazolidine derivatives insecticides containing same as an effective ingredient

An N-vinylimidazolidine compound of the formula (1):

• ##STR21## where R.sup.1 represents a hydrogen atom, a phenyl group, or an alkyl group having from 1 to 4 carbon atoms;
• R.sup.2 represents a hydrogen atom, a phenoxy group, a benzyl group, a phenyl group, a -C(=O)H group, a 2-chloropyridin-5 ylmethyl group, a benzoylamino group, an alkyl group having from 1 to 18 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms, an alkylthio group having from 1 to 4 carbon atoms, a phenyl group substituted by halogen atom(s), a phenyl group substituted by cyano group(s), a phenyl group substituted by phenyl group(s), a phenyl group substituted by benzoyl group(s), a phenyl group substituted by methylenedioxy group(s), a phenyl group substituted by alkyl group(s) having from 1 to 4 carbon atoms, a phenyl group substituted by alkoxy group(s) having from 1 to 4 carbon atoms, a phenyl group substituted by alkylthio group(s) having from 1 to 4 carbon atoms, a phenyl group substituted by haloalkyl group(s) having from 1 to 4 carbon atoms, or a phenyl group substituted by haloalkoxy group(s) having from 1 to 4 carbon atoms;
• and Z represent a 2-chloropyridin-5-ylmethyl group or a 2 -chlorothiazol-5-ylmethyl group.