The experiment in lab showed that among the 5 kinds of insecticides,the toxic effect on Holotrichia diomphalia Bates of Chlorpyrifos and Miral was higher.

• 在对 5种杀虫剂进行初选的基础上 ,确定 3%25米乐尔颗粒剂和 4 0%25毒丝本乳油的最佳使用剂量为米乐尔每公顷用量 4 5 kg,毒丝本每公顷用量 2 2 5 0 ml,达到防治要求 ;