STUDY ON EXTRACTION OF EFFECT COMPONENT FOR SNAIL CONTROL FROM SOLANUM XANTHOCARPUM AND ITS EFFECT AGAINST TO THE SNAIL

Aim To extract the effect component for snail control from solanum xanthocarpum and observe its effect against the snail intermediate host of Schistosoma japonicum.Methods Organic solvent was used to extract and obtain an effect component for snail,control from the fruit of Solanum xanthocarpum;the molecular weight of effect component for snail control was determined by electronic bombard spectrograph.The methods of immersion,spray and dust powder with Solanum xanthocarpumwere used to observe the effect of snail control.Results The results showed that the molecular weight of effect component for snail control is 722.The mortality of the snail by immersion for 24 and 48 hours were 96.7% and 100% under the concentration of 4.3200mg/L,and the room temperature of 25℃±1℃.LC 50of Solanum xanthocarpum to the snail for 24,48 and 72 hours were 0.621、0.332、0.181mg/L Conclusion Solanum xanthocarpum is a new plant extraction which has an excellent effect to the snail.