颗粒剂防治玉米螟是近年来研究成功的治螟新技术,杀虫效果好,残效长,配制方法容易掌握,已成为我国玉米螟防治上切实可行的措施,不少地方已大面积推广。有些地方反映:制造颗粒剂的颗粒截体必须通过两道筛,手续较费事,要求改进过筛工具。河北省交河县所创造的“双层颗粒剂筛”解决了这一问题。经我们仿造试用,证实性能确实 Granule control corn borer is successful in recent years to study the new stem borer technology, insecticidal effect is good, long residual effect, preparation methods easy to grasp, has become China’s corn borer control practical measures, many places have been large-scale promotion. In some places it has been reported that the pellets used to make granules must pass through two sieves, the procedure is more complicated and the screening tools are required to be improved. Jiaohe County, Hebei Province, created by the “double granules sieve” to solve this problem. Proved by our imitation trial, the performance is indeed