关键词: 蝇类, 侵害, 调查

Abstract: Objective To investigate the status of fly infestation in the urban areas of Xi’an, China, so as to provide a basis for scientific and effective prevention and control of flies.Methods Survey habitats were randomly selected in each of 11 administrative districts in Xi’an. The survey was conducted in both indoor areas and outdoor areas by visual observation. Descriptive statistical analysis was performed using WPS 14309 software. The fly infestation level was evaluated according to the Criteria for Vector Density Control-fly (GB/T 27772-2011).Results A total of 4 475 rooms of eight types of indoor habitats were selected. The rate of fly-positive rooms was 1.72%, and the fly density was 1.79 individuals/room, with the fly density control level being A. Among the habitats, the highest rate of adult fly-positive rooms was 2.48% in farmer’s markets. Among the urban areas, the highest rate of fly-positive rooms was 2.44% in Yanta District. Among the surveyed 722 outdoor habitats, the positive rate of fly breeding sites was 0.42%, with the control level being A. The urban areas harboring fly breeding sites included Huyi, Lianhu, and Weiyang districts, with the control levels all being B. Among the 2 161 fly-proof facilities, the qualified rate was 96.44%, with the control level being B. The qualified rate was lowest in farmer’s markets (92.53%) and Baqiao District (94.63%), where both control levels were C. The fly density control level of urban areas across Xi’an was B.Conclusions The creation of a Healthy City and holding major events can effectively reduce fly density by improving the city’s environmental sanitation of Xi’an and the fly density control level in urban areas of was generally good in 2022. Fly infestation was serious at farmer’s markets with low qualified rates of fly-proof facilities, and also in Yanta and Lianhu districts with a developed catering industry.

Key words: Fly, Infestation, Investigation