旅客列车卧铺车厢臭虫侵害调查

目的掌握旅客列车臭虫侵害状况及其变化规律,为臭虫防治策略提供依据。方法现场调查。结果广州铁路旅客列车臭虫侵害虫种为热带臭虫,分布于YW25T和YW25G车型,侵害程度由2011年6月的2.45%上升到2012年6月的14.07%(χ2=32.239,P0.05);观察期间,阳性上、中、下铺平均构成比分别为15%、48%、37%,阳性上、中、下铺臭虫密度指数中位数分别为3.50、3.46、5.59只/床,三者密度指数不尽相同(χ2=6.443,P0.05);不同时期臭虫侵害部位及好发部位不同。结论旅客列车臭虫侵害在广度上、深度上呈长期扩散趋势,臭虫防治工作中应注重不同阶段的重点。

Investigation on bedbugs in sleeper compartments of passenger trains

Objective To learn the situation of bedbugs in sleeper compartments of passenger trains. Methods Field investigation. Results In Guangzhou railway passenger train, the sleeper compartments of passenger trains, YW25T and YWzsc were invaded by Cimex hemipterus that the invasive degree had risen from 2. 45% to 14. 07% （χ^2 = 32. 239 ,P 〈0.05） ;the average constituent ratio of upper, middle and lower berth bedbug invaded were respectively 15 % ,48% ,37% , the bedbug index median respectively were 3.50,3.46,5.59 bedbugs, each berth （ χ^2 = 6. 443, P 〈 0. 05 ） ;the place and predilection site bedbug invaded in different periods would change. Conclusion In depth and breadth, the bedbug invaving passenger train spreads in a long-term trend to control bedbug invading in differendt stages, and should be emphasized key focus in work.