苏脲1号对凶小库蚊幼期作用的效果观察

苏脲1号对鳞翅目、双翅目昆虫的生长、发育有很强的抑制作用,浓度为0.001 ppm以上时,即可明显地抑制自育性凶小库蚊幼虫的发育,0.008ppm 以上时,幼虫的杀灭率为100%而幼虫的 LC_(50)为0.0026ppm,且死亡幼虫98.5%以上处于2—3龄期。各浓度组存活的幼虫化蛹后,羽化率在90%以上,羽化后7日内死亡率在18.9～30.6%之间。

THE EFFECT OBSERVATION ON THE DICHLOROURON TO THE LARVA STAGE FUNCTION OF AUTOGENOUS CULEX MODESTUS

Dichlorouron had very strong inhibition on the growth and development of the insect of Lepidoptero and Diptero.When the concentration of inse- cticide was over 0.001ppm,it would obviously restrain the development of larva stage of autogenous culex modcstus.When the concentration was over 0.008ppm,the hate of insecticide larva was 100 per cent.The LC(50) of larva was only 0.0026ppm,and over 98.5 per cent of the death larva was in the 2-3 years stage.After the alive larva of every concentration group was pupated,the eclosion rate of pupa was over 90 per cent.The death rate of adults in seven days was between 18.9-30.6 per cent.