Mollusicidal effects of some species of plants in hilly and mountainous areas

Objective To valuate the mollusicidal effects of some plants cultivated in the hilly and mountainous areas on On comelania hupensis and screen the plants against O. hupensis snails. Methods The mollusicidal effects of water extracts of plant materials were tested in laboratory. Result The LC 50 of all the species in 24 h,48 h,and 120 h reached the middle noxious level against O. hupensis snails. According to the taxis of LC 50 (s)in 120 h,Eucalyptus camaldulensis was best with a LC 50 of 0.013%, and Ailanthus altissima,Zanthoxylum bungeanum,Juglans regia,Melia azedarach,Nerium indicum,Pterocarva stenobtera,Cin namomum camphora,Vetiveria zizanioides,and Citrus reticulata were the second with LC 50 (s)between 0.020% and 0.370%,and Zingiber officinale had a lower effect on snail control with a LC 50 of above 0.500%. There was a correlation between the death rate of snails and soak time. Conclusion The resources of snail-restrained plants are very abundant,and four plants,such as Euca lyptus camaldulensis,Ailanthus altissima,Cinnamomum camphora,and Vetiveria zizanioides have some mollusicidal effect.