When Harmonia axyridis feeding Sehizaphis graminum the interference effects among the imagoes of female and male mixed are larger than those among same sex imagoes.

• 异色瓢虫捕食麦二叉蚜时，同等数量的异色瓢虫雌雄混合的干扰作用大于同一性别成虫间的干扰作用；