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目的探索上海中心城区地带不同环境及不同监测时段成蚊密度的季节变化趋势。方法选取5个监测点和2个特定时段采用人诱停落法进行连续194 d的成蚊动态监测研究。结果人诱停落法2012年194 d共捕捉到成蚊1 666只,季节变化趋势分析,第1时段和第2时段成蚊密度高峰分别集中在7月下旬和6月上旬,分别为4.60和1.52只/(人·次),2监测时段旬分布差异显著(χ2=221.528,P<0.01);5个监测点的成蚊密度均集中于7月份,但旬分布差异显著(χ2=91.570,P<0.01),1、3和4号点高峰均出现于7月下旬,分别为5.41、1.09和5.50只/(人·次),5号点和2号点分别出现于7月上、中旬,分别为1.50和1.00只/(人·次)。结论人诱停落法不同监测时段与监测点成蚊密度均存在显著差异,上海市中心城区应加强蚊虫监测,针对不同环境与不同昼夜时段蚊虫的季节变化建立更有效的风险评估与预警预报体制。
Objective To explore the seasonal variation trend of adult mosquito density in different environments and monitoring periods in downtown Shanghai. Methods Five monitoring sites and two specific time periods were selected for the study of dynamic monitoring of adult mosquitoes for 194 days using the method of human induced pause and drop. Results The trapping method was used to trap 1 666 adult mosquitoes in 194 days in 2012. The season trend was analyzed. The density of mosquitoes in the first and second periods were concentrated in late July and early June, respectively, 4.60 and (Χ2 = 221.528, P <0.01). The density of adult mosquitoes in all 5 monitoring sites were all concentrated in July, but the distribution in the ten days was significantly different (χ2 = 91.570, P <0.01). The peak of No.1, No.3 and No.4 appeared in late July, they were 5.41, 1.09 and 5.50 / person respectively, the spots of No.5 and No.2 appeared in July and the middle of July respectively. , Respectively, 1.50 and 1.00 / (person · times). Conclusion There are significant differences in adult mosquito density between different monitoring periods and monitoring sites during the period of human induced abscission. Monitoring of mosquitoes should be strengthened in downtown Shanghai and a more effective risk assessment and early warning system should be established in response to the seasonal changes of mosquitoes in different environments and different day and night periods .