关键词: 蝇密度, 监测, 季节消长

Abstract: Objective Master the population composition and seasonal abundance of the flies to provide scientific evidences for formulating vector control strategies by the government. Methods Monitoring the populations of flies from March to December in 2006-2016 in different environments with brown sugar and vinegar, to analyze the density and composition of flies. Results Chrysomya megacephala, Musca domestica, Lucilia sericata, and L. cuprina were the predominant species of flies in Ningbo area, which accounted for 80.71% of the total flies. The active phase of flies was from May to October each year, the peak of fly density occurred in June (23.67 flies/cage), but the peaks in different years were inconsistent and the latest appeared in September. The density of flies decreased obviously from 2012, density of M. domestica exceeded Chrysomya megacephala since 2013. The seasonal abundance of flies showed bimodal distribution in the green belts and residential areas, the peaks appeared in July and September, and in June and September, respectively. The density of flies in external environments associated with food processing facilities presented a unimodal distribution with peak in June. The peak of fly populations in market places was not prominent, density was higher during May to September than other months. Conclusion The density of flies generally showed a decreasing trend, but the control efficacy of house flies was lower than that of other flies. We should pay more attention to technical training of flies control persons, and to advocate integrated management of predominant fly species in key habitats to reduce the occurrence of flies-transmitted diseases.

Key words: Population density of flies, Monitoring, Seasonal fluctuation