不同化学制剂及复配对户尘螨的药效

目的通过有效制剂的复配以降低单一化学抑螨/杀螨剂的浓度并保证尘螨防治效果。方法参照国标GB13917.1-92规定的方法,选择6种化学制剂或其复配制剂,对户尘螨（Dermatophagoides pteronyssinus）进行室内药效比较。结果喷药24小时后,1.8%苯甲酸苄酯的杀螨率达100%;4%八硼酸二钠＋0.05%苄索氯铵＋0.9%苯甲酸苄酯复配制剂的杀螨率为88%;其余4种制剂杀螨率均低于70%,效果不佳。结论1.8%苯甲酸苄酯的急性杀螨效果最好,其次为4%八硼酸二钠＋0.05%苄索氯铵＋0.9%苯甲酸苄酯复配制剂。提示在保持一定杀螨效果的基础上,复配可降低单一化学抑螨/杀螨剂的使用浓度,并规避了苯甲酸苄酯的非水溶性质,可通过广泛长期使用而达到尘螨变应原的防治效果。

Efficacy of Various Acaricides and Compositional Formula against Dermatophagoides pteronyssinus （Acari： Astigmata）

Objective To decrease the concentration of single cheinical acaricide and certify the efficacy of dust mite control by dispensing effective acaricides. Methods The efficacy of 6 kinds of selected chemical acaricides and their compositional formula against Dermatophagoides pteronyssinus was tested under laboratory conditions according to the regulation method from GB 13917.1-92. Results After 24 hours of spraying acaricides, the acaricidal efficacy of 1.8% benzyl benzoate reaches to 100%; the efficiency of the formula of 4% disodium octaborate tetrahydrate, 0.05% hyamine and 0.9% benzyl benzoate is 88%; the effectiveness of the other four acaricides are all under 70%. Conclusions 1.8% benzyl benzoate has shown the best immediate effectiveness among these 6 acaricides, followed by the formula of 4% disodium octaborate tetrahydrate, 0.05% hyamine and 0.9% benzyl benzoate. The results indicate that the compositional formula of acaricides can decrease the concentration of single acaricide and avoid the water-insolubility of benzyl benzoate without compromising practical acaricidal efficacy against dust mites. The formula can control dust mite allergen through general longterm using in houses .