香茅醛对白纹伊蚊空间驱避作用的研究

The space repellency of citronellal on Aedes albopictus

目的探讨香茅醛作为一种可能的空间驱避剂的应用价值。方法在风洞系统内测试香茅醛不同剂量浓度诱导的白纹伊蚊(Aedes albopictus)行为反应及对宿主定向行为的影响。在密闭空间中,分别以0.013～0.250μg/cm3浓度的香茅醛处理白纹伊蚊24～96 h后测定其感受、定向寄主的能力。结果香茅醛高浓度(96%)对白纹伊蚊有一定的驱避作用,低浓度(3.0%～6.0%)则有一定的引诱作用。12.0%～96.0%浓度的香茅醛溶液对白纹伊蚊正常感受宿主气味均有一定的抑制作用,低于此浓度,抑制效果明显下降。白纹伊蚊在0.013～0.250μg/cm3浓度的香茅醛气味空间处理24～96 h后未影响其正常感受宿主气味的能力。结论香茅醛只有达到一定浓度时,才对白纹伊蚊定向宿主有一定的抑制效果,而且这种抑制具瞬时性。

Objective In order to study citronellal＇s repellency action and judge its prospects.Citronellal could be a spatial repellent against Aedes albopictus and play a major role in new repellent technology.Methods Olfactory behavior and host seeking ability of Aedes albopictus were tested with a olfactometer,and the inhibation of their host seeking ability following treatments at dosages of 0.013-0.250 μg/cm3 for 24-96 h were observed too.Results Citronellal at dosage of 96% could be an effective spatial repellent to Aedes albopictus,and at dosages of 3.0%-6.0% could be an effective attractant.It was observed that mosquitoes at dosages of 12.0%-96.0% all showed different degrees of reduction in host seeking ability,and the reduction were lost under the dosage of 12.0%.But citronellal was ineffective on reducing the host seeking ability of Aedes albopictus following treatments with dosages of 0.013-0.250 μg/cm3 for 24-96 h.Conclusion Citronellal can be a spatial repellent against Aedes albopictus at a higher dosages,and the inhibation is momentary.