N-phenyl-N'-carbophenoxy formamidines

A compound of the formula ##SPC42##

• wherein R.sub.1 represents hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.3 -C.sub.5 alkenyl or C.sub.3 -C.sub.5 alkynyl, R.sub.2 represents .alpha.-naphthyl, or phenyl substituted by halogen, C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.4 haloalkyl, C.sub.1 -C.sub.4 alkoxy, alkoxyalkyl having 1 to 4 carbon atoms in each of the alkyl moieties, C.sub.1 -C.sub.4 alkylthio, C.sub.3 -C.sub.4 alkynyloxy, dialkylamino having C.sub.1 -C.sub.4 alkyl groups, dialkenylamino having C.sub.3 -C.sub.4 alkenyl groups, dialkynylamino having C.sub.3 C.sub.4 alkynyl groups, N-lower alkyl-N-(C.sub.3 -C.sub.4)alkynylamino, N-lower alkyl-N-(C.sub.3 -C.sub.4)alkenylamino, OH, CN, NO.sub.2, cyclopentyl, monomethylaminomethyleneimino, dimethylaminomethyleneimino, 1,3-dioxolan, 1,3-dithiolan, and 4,5-dimethyl-1,3-dioxolan
• wherein the phenyl group is not substituted simultaneously in the 2-position by a methyl group and in the 4-position by a chlorine atom, and R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 represent one or more radicals which are the same or different, selected from hydrogen, halogen atoms or C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.3 -C.sub.5 alkenyloxy, C.sub.3 -C.sub.5 alkynyloxy, CF.sub.3, or nitro groups.