关键词: 乙醇溶液, 新型驱蚊剂, 白纹伊纹, 有效保护时间

Abstract: Objective To investigate the effective protection time against Aedes albopictus of different concentrations of new mosquito repellent solution dissolved by different concentrations of ethanol, and to determine a suitable ethanol concentration for repellent formulation with an appropriate repellent concentration. Methods According to "Laboratory efficacy test methods and criterions of public health insecticides for pesticide registration-Part 9:Repellent" (GB/T 13917.9-2009), the stock solution of the new mosquito repellent was diluted to gradient concentrations separately with 75% ethanol (15%, 10%, and 8% repellent solutions) and 35% ethanol (8% repellent solution). Results The effective protection time of 8% repellent was 4.63 h when it was prepared with 75% ethanol, and 3.74 h with 35% ethanol. With 75% ethanol as the solvent, the effective protection time was prolonged with the increase of the effective concentration of the new mosquito repellent formulation, being 4.63 h, 5.42 h, and 6.10 h for 8% repellent, 10% repellent, and 15% repellent, respectively. Conclusion Seventy-five percent ethanol is a suitable solvent for the stock solution of the new mosquito repellent, and the repellent effect against Ae. albopictus is good at an effective concentration of 15%.

Key words: Ethanol solution, New mosquito repellent, Aedes albopictus, Effective protection time