昌平区2003～2007年蝇密度监测结果分析

目的调查了解本地区不同蝇种及季节消长分布规律，为做好蝇类防治工作提供科学依据。方法采用天幕式捕蝇笼诱捕法，从每年4月上旬开始至10月下旬结束，在4个监测点每旬监测一次。结果2003～2007年共捕蝇6553只，平均密度为15．60只／（d·笼），蝇密度高峰期为5月中旬至7月下旬，密度居前3位的蝇种为黑尾麻蝇、家蝇和丝光绿蝇；蝇密度与气温呈正相关。结论昌平区5年来蝇密度呈逐年下降趋势；黑尾麻蝇为昌平区优势种群；蝇密度季节高峰期为5月中旬至7月下旬，持续约80d；蝇密度消长与气温变化呈正相关关系。

Analysis on the monitoring results of fly density in Changping district from 2003 to 2007

Objective To master the species and seasonal variation of flies in Changping district, and provide scientific basis for controlling flies and related diseases. Methods Cage trap method was used from early April to end of July. 4 monitoring sites were tested for every ten days. Results A total number of 6 553 flies were cap- tured, average density was 15.60 flies per day for every cage; the highest density appeared between middle of May and end of October. The three dominant species were HelicophageUa melanura, Musca clomestica and Lucilia sericata. There was a positive correlation between flies and temperature. Conclusion The flies density declined year by year from 2003 to 2007 in Changping district. Helicophagella melanura is dominant species. The flies density keeps in high level from middle of May to end of July （ about 80 days）. There is a positive correlation between the variation of flies density and temperature.