银杏外种皮提取物杀灭钉螺的初步研究

Preliminary Study on Molluscicidal Effects of Extracts From Sarcotesta of Ginkgo Biloba

目的:比较银杏外种皮的石油醚提取物与水提物对钉螺的杀灭作用。方法:采用超声萃取和热水浴回流的方法分别制得银杏外种皮石油醚提取物和水提物浸膏,再用去氯水分别制成不同浓度的药液,采用浸泡法杀灭钉螺,并定时观察灭螺效果。结果:两种提取物的药液均有杀灭钉螺的作用,其中石油醚提取物的杀螺效果尤佳,其浓度为0.125 g/L浸泡24 h时,钉螺死亡率达100%。结论:用银杏外种皮提取物制备的生药剂杀灭钉螺效果良好,是一种很有开发前景的植物杀螺剂。

Objective： To test the killing effects of Benzinum extract and Aqueous extract from sarcotesta of Ginkgo biloba on snail respectively. Methods： Using hypersound abstraction and hot water bath circumfluence to get benzinum and aqueous extracts from sarcotesta of Ginkgo biloba, then prepare a series of different concentration of solution using dechlorination water and set snails in these solutions to observe the effect timely. Results： Both solutions of sarcotesta of Ginkgo biloba extract had the effect of killing, while the benzinum extract was stronger, which could kill 100 percent of snails（ Oncomelania hupensis） when the concentration reaches to 1.25 mg/L for 24 hours. Conclutions： The extract of the sarcotesta of Ginkgo biloba had a stronger snail killing effect, so these preparations were a kind of snail-killing drug from plants source which may be of great development.