The present invention provides a composition comprising a synergistic pesticidally effective amount of methomyl and lufenuron in a weight ratio of about 14:1 to about 2:1. The composition is particularly useful for protecting and/or treating crops against insects of the order Lepidoptera.本發明提供一種組成物,其包含協同殺蟲有效量之重量比為約14:1到約2:1的滅多威和虱蟎脲。所述組成物對於保護和/或處理作物以對抗鱗翅目昆蟲特別有效。