地点：行健楼学术活动室526
摘要：In this talk, we study a host-generalist parasitoid model with Holling II functional response where the generalist parasitoids are introduced to control the invasion of the hosts. It is shown that the model can undergo three types degenerate Bogdanov-Takens bifurcations of codimension three, and a degenerate Hopf bifurcation of codimension at most two as the parameters vary. Moreover, we find that whether the invasion can be stopped and reversed depends on the initial populations of generalist parasitoids .
