蟑螂也是一种损害档案文件的害虫,它不但会咬破文件、书本,而且还会咬坏衣服和各种食物。过去,我们曾用医药公司买回的治蟑螂药,来消灭它,但是,没有杀死。去年,我们用了有关单位推荐的一种特制药,就把它完全消灭了。现把配制的方法介绍如下: 用百分之五十敌百虫溶液二毫升 Cockroaches are also pests that damage file archives, which can not only bite documents and books but also bite clothes and all kinds of food. In the past, we used cockroach medicine bought by pharmaceutical companies to destroy it, but we did not kill it. Last year, we used it as a special medicine recommended by the relevant authorities and completely eliminated it. Now the preparation of the method described below: with 50 percent trichlorfon solution two milliliters