Figure 5From: Hopf bifurcation analysis for a model of plant virus propagation with two delaysThe trajectories of system (4.1) with \(\tau_{1}=5.79, \tau _{2}=5.2>\tau^{*}_{20}=4.5647\). A Hopf bifurcation occurs from the positive equilibrium E. The initial value is \((4,29.5,69.5)\)Back to article page