关键词: 蜚蠊, 密度监测, 分析

Abstract: Objective To determine the population distribution and seasonal dynamics of cockroaches for effective prevention and control in Lanzhou city, Gansu province, China. Methods We used glue boards to catch the Blattella (cockroaches). We selected 3 survey sites in Lanzhou city and placed the glue boards at the 15^th of each month from 2006 to 2015. For each site, the investigators randomly selected two catering establishments, one farm product market, one hotel, one hospital and one residential area. All the sites were relatively fixed. The correlations between cockroach density and infestation rate were tested by one-sample Kolmogorov-Smirnov test and Bivariate Correlations. Results From 2006 to 2015, we placed 21 600 glue boards at chosen sites, and retrieved 21 126 boards, which caught 43 685 cockroaches. They were all B. germanica. The infestation rate was 13.86% and the average density was 2.07 per board. The density of farm product markets was the highest (3.28/board) and hospital was the lowest (0.26/board). The infestation rate of cockroach was positively associated with the density (r=0.892, P<0.01). Conclusion Blattella germanica was the predominant species in Lanzhou city. The population density peak was from June to October during 2006 to 2015. We should take measures to control cockroaches in April and May before the onset of the cockroach density peak.

Key words: Cockroach, Density monitor, Analysis