几种驱避化合物对白纹伊蚊寄主搜寻能力的影响

Effects of several potential spatial repellents on the host-seeking behavior of Aedes albopictus (Skuse) (Diptera:Culicidae)

研究了白纹伊蚊Aedes albopictus在含不同浓度的驱避化合物的空间内停留不同时间后,对其寄主搜寻能力的影响。结果显示:在密闭空间中,分别以0.013～0.500μg/cm3浓度的柠檬醛、丁香酚、芳樟醇、香叶醇、茴香醛处理白纹伊蚊24～96h后,试蚊均出现不同程度的定向寄主抑制,其中以茴香醛及香叶醇抑制效果最佳,但香茅醛各处理组试蚊均未受到影响。白纹伊蚊搜寻定向寄主能力受到抑制的个体,在实验室正常饲养后,可逐渐恢复;但茴香醛0.250μg/cm3处理试虫96h后,一直未能恢复正常的吸血行为。研究结果提示,茴香醛与香叶醇作为优良的空间驱避剂,在白纹伊蚊防控技术领域可发挥重要作用。

Host-seeking behaviors of Aedes albopictus after treatments with spatial repellents at a certain concentration for given time were studied. The results indicated that mosquitoes after treatments with citral, eugenol, linalool, geraniol, anisaldehyde at concentrations of 0. 013 - 0. 500 μg/cm^3 for 24 - 96 h, respectively, all showed different degrees of reduction in host seeking ability, of which geraniol and anisaldehyde were more effective. But citronellal was ineffective in reducing the host seeking ability of Aedes albopictus in all the test levels. Mosquitoes which had lost the host seeking ability after above treatments with geraniol, citral, eugenol, linalool and anisaldehyde were able to recover to the normal ability when fed the normal 6% syrup diet for some time, but the mosquitoes after a treatment with 0.250 μg/cm^3 of anisaldehyde for 96 h showed a long continually inhibitory response for host seeking ability. These initial laboratory results clearly showed that anisealdehyde and geraniol could be promising spatial repellents against Ae. albopictus and may play a major role in the new repellent technology.