Evaluation of biological and chemical insecticide mixture against Aedes aegypti larvae and adults by thermal fogging in Singapore
Evaluation of biological and chemical insecticide mixture against Aedes aegypti larvae and adults by thermal fogging in Singapore
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DOI：
10.1046/j.0269-283x.2001.00311.x
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发表时间：
2001-09-01
影响因子：
1.9
通讯作者：
Yatiman, R
中科院分区：
文献类型：
--
作者：
Chung, YK;Lam-Phua, SG;Yatiman, R
为提高新加坡登革热病媒控制的工作效率，采用热雾发生器（Agrofog(R) AF40）同时施用杀幼虫剂和杀成虫剂。以苏云金芽孢杆菌（Bacillus thuringiensis var. israelensis, Vectobac(R) 12 AS）为1.5 L/ha的生物杀幼虫剂和100 g /ha的杀成虫剂（pirimiphos-methyl (Actellic， R) 50 EC），用水稀释10倍。评价了该混合物气溶胶对埃及伊蚊（Aedes aegypti， L.）的杀灭效果。（双翅目：库蚊科）在生物测定中使用10只成年雌蚊笼，暴露在距离手持式发生器0.3-2.4米的高度和3-12米的距离。装有200毫升水的杯子在离发生器相同距离处暴露于气溶胶应用中，在地面进行处理。随后的幼虫生物测定。喷雾后第1、7、14、21和28天，每杯暴露20只幼虫48 h，雾滴VMD为57，在3 m高度暴露2 s，雌蚊和雌蚊均被杀死。在距离3 m处成蚊死亡率为92-100%，幼虫死亡率为100%，距离雾化器12 m处死亡率仅为10-13%。在处理过的杯子中，即使在处理后1个月，暴露48个月的幼虫死亡率也很高（92%）。结果表明，用Vectobac(R) 12AS和Actellic(R) 50ec混合药剂同时杀灭伊蚊成虫和幼虫具有较好的实用性，且在处理过的容器中具有较长的杀灭效果。
To improve the operational efficiency of dengue vector control in Singapore, larvicide and adulticide were applied together by thermal fog generator (Agrofog(R) AF40). The mixture consisted of Bacillus thuringiensis var. israelensis (Vectobac(R) 12 AS) as biological larvicide at 1.5 L/ha and pirimiphos-methyl (Actellic(R) 50 EC) as adulticide at 100 g ai/ha, diluted 10-fold with water. Aerosol of this mixture was evaluated against the mosquito Aedes aegypti (L.) (Diptera: Culicidae) in bioassays using cages of 10 adult females exposed at heights of 0.3-2.4 m and distances of 3-12 m. from the hand-held generator. Cups containing 200 mL water were treated at ground level by exposure to the aerosol application at the same distances from the generator. Subsequent larval bioassays. on days 1, 7, 14, 21 and 28 post-spray involved exposing 20 larvae/cup for 48 h. Droplets had VMD 57 mum and female mosquitoes were killed by 2 s exposure to the aerosol at 3 m. We obtained 92-100% mortality of the adult mosquitoes and 100% control of larvae at 3 m distance, but only 10-13% mortality at 12 m from the fogger. In treated cups, larvae showed high mortality (92%) when exposed for 48 It even 1 month post-treatment. Results demonstrate the practical advantage of using this mixture of Vectobac(R) 12AS and Actellic(R) 50 EC for simultaneous control of Aedes adults and larvae, with prolonged larvicidal efficacy in treated containers.