以往的实验曾表明,许多种化合物在实验室内有杀虫作用而在现场不同墙壁表面上却无效。本文作者为了测定杀虫剂在现场是否有与在实验室内同样的持效,对在实验室内有24周持效(雌蚊接触药面1小时后,24小时内的死亡率在70%或70%以上)的二二三、马拉硫磷、残杀威、杀螟硫磷、Phoxim、Chlorphoxim及Pirimiphos-methyl进行了现场试验。将各种药物的水液乳化剂按每平方米用药1克的剂量,分别喷洒在空屋内涂有水制橡浆的灰泥板壁面上和涂有油漆的木板壁面上,而后用四斑按蚊雌蚊作接触试验。结果药物杀死69%以上雌蚊的持效时间 Previous experiments have shown that many compounds have insecticidal effects in the laboratory and are ineffective on different wall surfaces in the field. In order to determine if the pesticide has the same efficacy in the laboratory as the pesticide in the laboratory, the authors have a 24-week hold in the laboratory (female mortality of 70% or 70 within 24 hours after exposure to the drug for 1 hour) %) Of the two two three, malathion, propoxur, fenitrothion, Phoxim, Chlorphoxim and Pirimiphos-methyl conducted a field test. A variety of drugs, water-based emulsifier at a dose of 1 g per square meter of the drug were sprayed in the empty house painted with water-based plaster mortar wall and painted wood wall, and then with a four-spot press Mosquito female mosquito for contact test. Results The drug kills more than 69% of the female mosquito’s duration of effect