Effect of tea saponin on growth of apple snail(Pomacea canaliculata)at different developmental stages

[Objective]The present experiment was conducted to determine the effect of tea saponin stress on the growth of apple snail(Pomacea canaliculata)at different developmental stages in order to provide references for research on action mechanism of tea saponin on apple snail. [Method]The juvenile, young, and prime apple snails were treated by two concentrations(LC25 and LC50)of tea saponin while their survival rate, weight increment rate, and weight inhibition rate were investigated at different stages, respectively. [Result]After being treated by tea saponin, the survival rates of apple snail at different stages decreased by 6.2%-22.5% as compared to the control group, and the inhibition rate of maximum body weight reached 11.69%-49.55%. After 10-40 d of treatment, tea saponin showed the highest weight inhibition rate on apple snails at different developmental stages. Mortality increment and weight inhibition rate of juvenile apple snails were significantly higher than young and prime apple snails. [Conclusion]It was concluded that tea saponin exerted inhibition on apple snails at different developmental stages, and its inhibition intensity was influenced by its concentration and the developmental stages of apple snails.