A substituted benzoylurea compound of the formula (I): ##STR1## wherein R1 is a hydrogen atom, a halogen atom or a nitro group, each of R2 and R3 is a hydrogen atom, an alkyl group, --COR6 (wherein R6 is an alkyl group or an alkoxy group) or --SO2 R6 (wherein R6 is as defined above), or R2 and R3 may form together with the adjacent nitrogen atom a heterocyclic ring, R4 is a halogen atom, a substit