皂荚提取物的杀螺活性

[目的]研究皂荚生物农药活性，开发利用皂荚资源，发展环境友好的绿色植物源农药。[方法]采用室内生测和田间试验研究皂荚壳乙醇提取物的杀螺活性。[结果]皂荚提取物对福寿螺有显著的毒杀活性，对幼螺和成螺72 h的LC₅₀分别为40.56、109.83 mg·L^-1。田间试验表明，皂荚提取物对福寿螺有较好的防效，施用40 g·m^-2的皂荚提取物处理7 d后卵块减少率为100.00%（成螺失去产卵的能力），防效为（99.12±1.26）%。[结论]皂荚提取物对福寿螺较好的生物防治效果，是一种潜在的生物杀螺剂。

Activity of Gleditsia saponin extract on Pomacea canaliculata

[Aim] Systematic investigation of the biological pesticide activity of ethanol extract from the shell of Gleditsia sinensis Lam (Leguminous Gleditsia) extracts could contribute to the utilization of G. sinensis resources and the development of plant-derived pesticides.[Method] Laboratory and field molluscicidal activity of G. sinensis extract ethanol extract from the shell of G. sinensis. was determined via immersion tests.[Result] G. sinensis extract showed significant molluscicidal activity against Pomacea canaliculata, with an LC₅₀ of 40.56 mg·L^-1 for young snails and 109.83 mg·L^-1 for adult snails after 72 h. The field experiment demonstrated that the egg mass was reduced by 100.00% (the adults were unable to lay eggs) and the control effect was (99.12±1.26)% after 40 g·m^-2 of G. sinensis extract was applied for 7 days.[Conclusion] G. sinensis extract had remarkable molluscicidal activity and a good control effect on P. canaliculata. Consequently, it is a potential botanical molluscicide.