Trebon对印鼠客蚤毒杀效果研究──Ⅰ.Trebon毒效及与其它杀虫剂作用的比较

Studies on the Toxicity of Trebon to Xenopsylla cheopis

目的：观察新型杀虫剂Trebon对印鼠客蚤（Xenopsyllacheopis）的毒效。方法：水浸法、喷粉法和药膜法。结果：（1）不同处理方法的灭蚤效果不同，其顺序为：水浸法＞喷粉法＞药膜法，LD100的最低值分别为5ppm、0．3和0．5mg／m2；（2）Trebon与奋斗呐和溴氰菊酯的毒效比较：当有效成分含量≥5mg／m2时，24小时死亡率均为100％；用KT50的倒数表示击倒速度，Trebon是奋斗呐的2．5倍（药膜法及喷粉法），是溴氰菊酯的8．2倍（药膜法）；（3）Trebon在室温下的持效＞365天（药膜法），50℃下＞35天。结论：该药对印鼠客蚤和猫栉首蚤击倒速度快，死亡率高，持效期长，对人畜几乎无毒，既可室内外大面积施用，亦适用于宠物灭蚤。

The toxicity of trebon, a new type pesticide lowtoxic to man and animals, has been studied on the rat flea Xenopsylla cheopis. It was revealed that ① the efficacy of trebon with following different treatment i. e. impropation > spreading> residual smearing, LD100 being 5ppm, 0. 3mg/m2 and 5. 0mg/m2, respectively;② although the 100 % mortality (24 hour) can be expected with either trebon. or fendona or deltamethrin with the dose of 5mg/m2 and above, trebon showed a better knock-down effect than that of fendona or deltamethrin, the KT50 of trebon was 2. 5 times that of fendona (spreading method), and 8. 2 times that of deltamethrin (residual smearing); ③ when used as residual smearing, trebon can keep its efficacy more than 365 days under room temperature, and about 35 days at 50℃.