溴敌油膜剂灭蚊幼效果观察

OBSERVATION ON INSECTICIDAL EFFECT OF CIU-D OIL-MEMBRANE AGENT TO MOSQUITO LARVAE

本文观察了由溴氰菊酯、ＤＤＶＰ、油类及表面活性剂等成分组成有效浓度为０．２５％的溴敌油膜剂的灭蚊幼效果。实验室测试表明，该剂组方具有增效作用（ＣＴＣ为１０５．９１）。用１ｍｌ／ｍ￣２用量对致倦库蚊和白纹伊蚊幼虫的ＫＴ＿（５０）分别为１０．４和７．８ｍｉｎ，持效１８天以上，优于其他各组分对照剂。现场用于住宅区域的蚊幼孳生地，效果显著，持续１０～３０天。

iu-D oil-membrane agent consisted of Deltamethrin,DDVP,oil andsurface active agent.It killed mosquito larvae with its effective concentra-tion 0.25%.The results showed that KT_(50) to Culex pipiens fatigans andAedex albopictus larvae with lml/m￣2 were 10.4 and 7.8 minutes, and theeffective duration were 18 and 20 days respectively in laboratory. Its kil-ling efficacy was better than that of non-oil-membrane Ciu-D admixtureand other agents.The insecticidal effect of Ciu-D oil-membrane agent usedin mosquito larvae habitats by field trials was remarkable. The mortalityof 100 percent lasted for 10～30 days.