Optimal Control Policies of Pests for Hybrid Dynamical Systems

Figure 6

The effects of times of spraying pesticides and parameter sets on the threshold level 𝜆₂. The parameter values are as follows:  𝑎₁=0.8,  𝑑=0.25,  𝑟=1.2,  𝑐=0.3, and  𝛼₂=0.7. ((a), (b))  𝛿₂=0.75,  𝛿₃=0.94,  𝜎=6.3, and  𝑇=10; ((c), (d))  𝛿₂=0.7,  𝛿₃=0.91,  𝜎=6.3, and  𝑇=10.

(a)

(b)

(c)

(d)