PCT No. PCT / JP98 / 00803 Sec. 371 Date Aug. 23, 1999 Sec. 102(e) Date Aug. 23, 1999 PCT Filed Feb. 26, 1998 PCT Pub. No. WO98 / 38176 PCT Pub. Date Sep. 3, 1998A 1-phenyl, naphthyl or aralkyl-4-(N,N-di-substituted carbamoyl)-1,2,4-triazol-5-one derivative represented by the general formula (I) wherein A is an unsubstituted or substituted
phenyl group, 1-naphthyl group, 5,6,7,8-tetrahydro-1-naphthyl group or an aralkyl group such as an unsubstituted or substituted
benzyl group and so on, R1 is a lower
alkyl group and so on, and R2 is an unsubstituted or substituted
phenyl group and so on, was prepared as novel compounds. This 1-substituted-4-carbamoyl-1,2,4-triazol-5-one derivative does not substantially exhibit
phytotoxicity to various agricultural
crop plants and therefore is useful as a selective herbicide.