关键词: 蝇类, 密度, 种群构成, 季节消长

Abstract: Objective To investigate the species composition of the flies and seasonal fluctuation in Liaoning province and to provide a scientific basis for controlling the breeding and control of flies. Methods The cage trap method was used to capture flies from April to October during 2013-2017. The monitoring sites were chosen in the residential areas, restaurants, greenbelts and farm produce markets in fourteen cities of Liaoning province. Then the composition ratio of flies was analyzed, and the density differences of different species and different environments and their seasonal fluctuations were compared. Results A total of 3 000 cages, 123 855 flies and the density of 6.88 per cage per hour from 2013 to 2017, annual fly density was 7.19, 9.23, 6.42, 5.72, and 6.03 per cage per hour in 2013, 2014, 2015, 2016, and 2017 respectively. Lucilia sericata (45.12%), Musca domestica (14.80%) and Muscina stabulans (13.89%) were the predominant species. The highest density of flies was found in farm produce markets (9.96 per cage per hour) and the lowest was found in the residential areas (4.22 per cage per hour). The overall seasonal prevalence in last five years was a single-peak curve. The peak density of flies in each year appeared in middle July or middle August. Conclusion The control system of flies in Liaoning province should be coordinated with the seasons. In July and August when flies are most active, control measures should be adopted, which mainly focus on environmental management and supplemented by pesticide applications to effectively reduce the density of flies.

Key words: Flies, Density, Species composition, Seasonal fluctuation