Methods Linking-cask way and standard way were used for examining the killing effect of killg cockroach chalk,The mortality of 24h,48h and 72h were used for comparing two kind of way.

• 方法采用连接筒法和国标法,通过观察24、48和72小时杀蟑螂笔对德国小蠊的死亡率比较两种方法的差别。