Abstract:

Objective To identify the species composition, distribution, seasonal variation and infestation of cockroaches in the urban areas of Dongyang city, providing the basis for development of roach control strategies. Methods Roach glue traps were used to monitor the dynamics of cockroaches. Results Three species of cockroaches under 2 genera of 2 families were found in the region, and Blattella germanica was the dominant species. From January 2007 to December 2008, 3000 pieces of glue traps were administered with a result of 977 captures. With 391 traps positive of captives, the infestation rate ranged from 0 to 31.2%, which was significantly different among various industries (χ²＝213.61, P<0.01). Peaking from June to November, the roach density manifested a unimodal pattern on seasonal dynamics. Scaling highest from July to September, the infestation rates were statistically different through the months (χ²＝153.01, P<0.01). Conclusion Farmer’s markets, hospitals and the catering industry constituted the major breeding places for cockroaches in Dongyang city’s urban areas. In view of the constant expansion and gradual invasion of cockroach infestation to hospitals and residential areas, effective control measures should be taken to curb the spread.

Key words: Cockroach, Population distribution, Seasonal dynamics, Infestation rate, Surveillance

摘要：

目的 了解东阳市城区蜚蠊种群组成、分布、季节消长及其侵害情况，为蜚蠊的防制提供科学依据。方法 采用粘蟑纸粘捕法进行监测。结果 东阳市城区共发现蜚蠊3种，隶属2科2属，德国小蠊为优势种群，2007年1月至2008年12月共布放粘蟑纸3000张，捕获蜚蠊977只，阳性蜚蠊张数为391张，侵害率为0～31.2%，不同行业蜚蠊侵害率差异有统计学意义(χ²＝213.61，P<0.01)。6－11月为蜚蠊密度高峰期，季节消长曲线呈单峰型，7－9月侵害率最高，不同月份蜚蠊侵害率差异有统计学意义(χ²＝153.01，P<0.01)。结论 东阳市城区蜚蠊孳生场所主要是农贸市场、医院和饮食行业，近年来侵害范围不断扩大，逐渐向医院和居民住宅蔓延，应采取有效措施加以控制。

关键词: 蜚蠊, 种群分布, 季节消长, 侵害率, 监测