NEW MATERIAL:A compound shown by the formula I (R1 is H, or halogen; R2 is halogen; R3 is R2, or lower alkyl; R4 is group shown by the formula II, formula III, or formula IV).

EXAMPLE: N-2, 6-Difluorobenzoyl-N'-4-(2,3,5-trifluorophenoxy)-3,5-dimethylphenyl urea.

USE: An insecticide, having more improved insecticidal effect than well-known diflubenzuron, especially effective against lepidopterous larvae such as diamondback moth, Mamestra brassica Linne, etc., dipterous larvae such as Culex pipiens pallens, Musca domestica Linne, etc., coleopteran larvae, etc. An application amount is 5W500g/10a, when an emulsion, wettable powder, etc., is diluted with water, an application concentration is 10W1,000ppm and dust, oil, etc., can be used as it is in preparation without being diluted.

PREPARATION: For example, a benzoyl cyanate compound shown by the formula V is reacted with a novel aniline compound shown by the formula VI in a solvent such as preferably toluene, etc., at 0W80°C for 1W50hr under normal pressure to give a compound shown by the formula I.