德国小蠊对7种杀虫剂的抗性调查

Resistance of Blattella germanica to seven insecticides

目的 了解南宁饭店德国小蠊的侵害特点和对常用杀虫剂的抗药性。方法 采用目测法调查德国小蠊的侵害情况 ,采用药膜接触法测定抗药性。结果 调查 42 2间房间 ,有德国小蠊侵害的占 69 7% ,主要栖息场所阳性 79 6% ,对拟除虫菊酯类、残杀威属低抗性水平 ,抗性系数在 2 56～ 4 0 5之间 ;对敌敌畏抗性系数 >8 5,属已产生抗性。结论 南宁市饭店德国小蠊主要由外界货物带入 ,侵入后很快成为局部优势种群 ,且栖息场所呈多样化 ,极容易扩散到其它住区场所 ,原有抗性并没有因环境改变而改变 ,抗性水平与全国其他省水平相当。

Objective To investiga te infestation condition and resistance of Bl attella germanica in Nanning restaurant s.Methods Investigating encroachm ents by sight and testing resistance to ins ecticides based on WHO.Results 69 7% roo m s of the 422 surveyed were encroached upo n by Blattella germanica and 79 6% of the main habitates were positive.Resistance ratioes to pyr ethroid and propoxur were ranged from 2 56 to 4 05 fold Resistance to DDVP was more than 8 5 fold. Conclusion Bl attella germanica in Nanning restaurant s were mainly introduced from other provin ces and became local preponderant population in short time.Their habitat es were varied. The resistance levels corresp onded to other provinces l evel,not changed with environment.