一种新型灭蚊膜对白纹伊蚊控制效果的研究

A study of the control effect of a new mosquito control film on Aedes albopictus

目的探讨新型灭蚊膜对白纹伊蚊幼虫和蛹的控制效果,评价其对蚊虫生长发育的影响及致死活性。方法2019年7-9月在实验室内采用幼虫浸渍法,将30只白纹伊蚊幼虫或蛹分别放置于含有不同蚊幼杀虫剂的搪瓷盆中,观察并记录幼虫或蛹的死亡时间、化蛹或羽化情况;利用SPSS 18.0软件计算半数致死时间(LT50)及95%可信区间(CI)、建立毒力回归方程,并进行统计学分析。结果新型灭蚊膜组和双硫磷组白纹伊蚊蚊蛹的24 h死亡率分别为100%和2.22%,两组间差异有统计学意义(χ2=172.174,P<0.001),双硫磷组未死亡的蛹均羽化为成蚊。球形芽孢杆菌组、苏云金芽孢杆菌以色列亚种组、双硫磷组幼虫的24 h死亡率均为100%;1 h观察1次生物膜组和5 h观察1次生物膜组幼虫的24 h死亡率分别为55.56%和60.00%,两组间差异无统计学意义(χ2=0.364,P>0.05),所有未死亡的幼虫均未化蛹。新型灭蚊膜对高龄组和低龄组幼虫的24 h死亡率分别为90.00%和18.89%,两组差异有统计学意义(χ2=91.747,P<0.001)。结论新型灭蚊膜对白纹伊蚊幼虫及蛹均有较好的控制效果,可用于蚊虫防控。

Objective To investigate the control effect of a new mosquito control film on larvae and pupae of Aedes albopictus,and to evaluate its influence on mosquito growth and development and its lethal activity.Methods From July to September 2019,30 larvae or pupae of Ae.albopictus were placed in enamel pots containing different types of insecticides using the larval dipping method in the laboratory,and their death time and the status of pupation or emergence were observed and recorded.SPSS 18.0 software was used to calculate the median lethal time(LT50)and 95%confidence interval(CI),establish a toxicity regression equation,and conduct a statistical analysis.Results The Ae.albopictus pupae in the new mosquito control film group and the temephos group had 24-hour mortality rates of 100%and 2.22%,respectively,with a significant difference between the two groups(χ2=172.174,P<0.001);the surviving pupae of the temephos group all emerged as adult mosquitoes.The larvae in the Bacillus sphaericus group,the B.thuringiensis subsp.israelensis group,and the temephos group all had a 24-hour mortality rate of 100%.The larvae treated with the new mosquito control film had 24-hour mortality rates of 55.56%and 60.00%when observed once every 1 and 5 hours,respectively,with no significant difference between the two observation groups(χ2=0.364,P>0.05);all the surviving larvae in the two groups did not pupate.The larvae in the older group and the younger group had 24-hour mortality rates of 90.00%and 18.89%,respectively,after being treated with the new mosquito control film,with a significant difference between the two groups(χ2=91.747,P<0.001).Conclusion The new mosquito control film has good control effect on larvae and pupae of Ae.albopictus,which can be used for mosquito prevention and control.