Preparation of Cyclodextrin-Treated Insectproof Papers and Their Persistency

制备了环糊精（CD）处理的防虫纸，并对其持久性和保持性进行了研究。使用的杀虫剂有丙烯菊酯、杀虫磷、八氯二丙醚和氯菊酯。试验昆虫为中国卡罗布库蚊成虫、粗纹伊蚊幼虫、褐毛虱幼虫和腐背螨和粉蚧螨2种。对两种不同的体系制备cd处理防虫纸进行了评价。一种是单阶段浸渍系统（系统A），另一种是两阶段浸渍系统（系统B），第一阶段为CD浸渍，第二阶段为杀虫剂浸渍。在两种体系中，cd处理后的农药残留都有所增加，但A体系的农药残留高于B体系。在B体系中，用于浸渍杀虫剂的丙酮溶剂可能是导致农药残留不足的原因。CD处理后的防虫效果略有下降，特别是在药剂与CD的摩尔比为1:2时，CD处理后的防虫效果略有下降。氯菊酯本身的保持性较好，添加CD的保持性较好。Permetrin对粉螨有显著的抑制作用，对斑蝥螨也有较好的抑制作用。

Cyclodextrin(CD)-treated insectproof paper sheets were prepared and their persistency and retention behavior were investigated. Insecticides used were allethrin, fenitrothion, octachlorodipropylether and permethrin. Tested insects were adults of Callosobruchus chinensis Linne, larvae of A. verbasci, larvae of Tinea pellionelia and two mites (Tyro- pliagus putrescentiae and Dermatophagoides farinas).Two different system was evaluated for the preparation of CD-treated insectproof papers. One (system A) was the single stage impregnation system, and the other (system B) was the two stage (CD at first stage, insecticide at second stage) impregnation system. Insecticides retained in sheets during storage increased with CD-treatment in both system, but the sheets from system A gave rather high retention than those from system B. In system B, acetone solvent for the impregnation of insecticides may be responsible for the inadequate inclusion of insecticide. CD-treated sheets showed rather high persistency than no CD sheets, though CD- treated sheets showed a slight retardation for the insect-proofing effect , especially at the molar ratio of 1:2 (insecticide : CD).Retention of permethrin was excellent by itself and improved more over by CD addition. Permetrin showed remarkable effect to Dermatophagoides farinae mite, and also good taxity to Anthrenus verbasci.