European grapevine moth (GVM) and European grape berry moth (EGBM), which are main pest insects of grapes in Europe, are controlled simultaneously by using a respective sex pheromone substance.Provided is a method for simultaneously controlling GVM and EGBM comprising the steps of incorporating, into a GVM sex pheromone mating disruptant, 5 to 30% by weight of an EGBM sex pheromone component based on an amount of a GVM sex pheromone component in the GVM sex pheromone mating disruptant at the time when in a district A where GVM is a main pest insect, a secondary pest insect EGBM has emerged or is likely to emerge, thereby obtaining a mating disruptant of both GVM and EGBM or incorporating, into an EGBM sex pheromone mating disruptant, 5 to 35% by weight of a GVM sex pheromone component based on an amount of an EGBM sex pheromone component in the EGBM sex pheromone mating disruptant at the time when in a district B where EGBM is a main pest insect, a secondary pest insect GVM has emerged or is likely to emerge, thereby obtaining a mating disruptant of both GVM and EGBM.
