樟树水浸液的灭螺效果

研究了新鲜樟树的茎皮、根皮和叶的水浸液对钉螺的杀灭效果。结果表明：通过一定时间的处理，樟树水浸液对钉螺有明显的毒杀作用。其中，0．5％以上的茎皮和根皮的水浸液对钉螺具有35％-100％的毒杀作用；处理时间在72h时，死螺率可达80％-100％。0．5％的樟树根皮水浸液浸泡72h时，死螺率为95％；1％的樟树根皮水浸液浸泡72h时，死螺率为100％。当用同种水浸液浸泡时，钉螺死亡率随水浸液浓度的增加而升高；随着浸泡时间的延长，钉螺的死亡率也升高。

The Effect of the Soaking Liquids of Cinnamomum camphora on Killing Oncomelania hupensis

The paper studied the effect of the soaking liquids of Cinnamomum camphora on killing Oncomelania hupensis. The result showed that the soaking liquids of C.camphora have evident killing effect on O.hupensis after treating for established time. The soaking liquids of stems and roots at>0 5% concentration could kill 35%-100% bodies of O.hupensis . When treated for 72 hours, the mortality of O.hupensis was up to 80%-100%. The soaking liquid of 0 5% or 1% fresh roots of C.camphora killed 95%, 100% bodies of Oncomelania hupensis , respectively, when O.hupensis was treated for 72 hours. With the same kind of soaking liquid, the mortality of O.hupensis rises when the concentration increases.And with the treating time prolongs,the mortality also rises.