A Study On The Control Of The Tea Stick Thrips By The East Asian Stink Bug

Dendrothrips minowai Priesner is a common sucking pest in Guizhou tea garden.This kind of pest affects the normal growth of tea tree by absorbing the stalk of tea tree and the juice in the young leaves,which affects the quality and yield of tea.Orius sauteri(Orius)is one of the most predatory natural enemies in tea gardens.It can play a good role in controlling the number of target pests and tea sticks in tea gardens.Its practical application in tea gardens has not yet begun to study.Therefore,how to make full use of the natural enemy resources of O.sauteri to control tea tree pests and play their role in the regulation of D.minowai is inevitable.In the second aspect,the predation functional response was used to evaluate the ability of O.sauteri of different ages to control nymphs and adults of D.minowai.The results showed that the potential of O.sauteri to control nymphs of D.minowai from large to small was: adult > fourth instar nymph > second instar nymph;the potential of O.sauteri to control adults of D.minowai from adult to genus > fourth instar nymphs >second instar nymph;the potential of O.sauteri to control adults of D.minowai from adult to genus at different temperatures was from high to low: 25? > 30? > 20? >15?.In the disturbance reaction,species competition and mutual interference existed among the O.sauteri.Through the life cycle table,the ability of O.sauteri to control the D.minowai was further evaluated.The O.sauteri successfully passed a generational period,the cumulative survival rate was 0.355,and the female ratio was0.5625.The median growth rate was 0.09944.The results show that the O.sauteri has a good control potential for the D.minowai.At the same time,field experiments were carried out in Kaiyang Tea Garden to control the third instar nymphs of D.minowai and Empoasca vitis Gothe.The results showed that the control effect of O.sauteri on D.minowai was 69.23% one month after releasing,and 57.97% on E.Gothe.