In the period of nymph stage and ecdysis peak, the control effects was better but it need highly professional technique and not suitable for guiding farmer to control the midges.

• 在吸浆虫蛹期、羽化高峰期防治虽能获得较好的防治效果，但需要专业技术人员掌握发育进度，不适合指导群防群治；