新疆北屯地区蚊虫种群动态变化及综合防控

Study on population dynamics and integrated control of mosquitoes in Beitun of Xinjiang, China

目的掌握新疆北屯地区蚊虫种群的动态变化规律,在此基础上提出蚊虫的防控对策。方法 2011-2013年每年的4-9月连续监控。幼蚊:对北屯地区不同水体,每两天进行1次幼蚊调查,对阳性水体施用苏云金芽孢杆菌以色列亚种,并连续48 h定点监测;成蚊:每晚22:00-23:00在北屯市广场利用灭蚊灯收集蚊虫进行密度监测。结果北屯地区蚊幼虫主要在5-7月出现,5月下旬至6月上旬为密度高峰期,孳生水体蚊幼虫密度达18 240条/m2,使用苏云金芽孢杆菌以色列亚种防效可达96%;成蚊活动时间为4-9月,6-7月为其活动高峰期,最高密度为85只/d(灭蚊灯收集)。采用生物农药B.t.i(效价为480 ITU/mg)及2.5%高效氯氰菊酯乳油、10%啶虫脒乳油及有机硅增效剂2次飞机灭蚊,蚊虫密度呈曲线式下降。结论北屯地区蚊虫密度较高,通过3年综合防控,蚊虫密度下降了75%。

Objective To investigate the population dynamics of mosquitoes in Beitun of Xinjiang Uygur Autonomous Region,China, and to provide countermeasures for the control of mosquitoes in Beitun.Methods The population dynamics of mosquitoes were monitored continuously from April to September during 2011-2013. The number of immature mosquitoes in different aquatic habitats was monitored every two days. The water bodies positive for immature mosquitoes were sprayed with biological agents （Bacillus thuringiensissubsp. israelensis please specify the product used） and continuously monitored for 48 hours. The number of adult mosquitoes was surveyed by light trap capture from 10p.m. to 12 p.m. every day at the city square of Beitun.Results Immature mosquitoes appeared from May to July, with a peak density from late May to early June. The density of immature mosquitoes in breeding sources was 18 240 mosquitoes/m2. The control efficacy of biological agent （B.t.i） reached up to 96%. Adult mosquitoes usually appeared from April to September, with a peak activity period from June to July. The highest density of adult mosquitoes was 85 mosquitoes per day （determined by light trap）. Mosquito density showed decline curve by two times of aerial spraying insecticides including biological pesticides B.t.i（Titer 480 ITU/mg） and 2.5% lambda-cyhalothrin EC,10% acetamiprid EC and silicone additives to control mosquito.Conclusion Mosquito density used to be high in Beitun, but was decreased by 75% through integrated control for three years.