Journal
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
Volume 24, Issue 9, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218127414501144
Keywords
Switched host-parasitoid model; integrated pest management; host outbreak; multiple attractors; switching frequency
Funding
- National Natural Science Foundation of China [11171199]
- Fundamental Research Funds for the Central Universities [GK201305010, GK201401004]
- Key Laboratory of Biologic Resource Protection and Utilization of Hubei Province [PKLHB1332]
- Natural Science Foundation of Hubei Province [CDZ2010047]
- Soft Science Research project of Hubei Province [2012GDA01309]
- Natural Sciences and Engineering Research Council of Canada
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The switched discrete host-parasitoid model concerning integrated pest management (IPM) has been proposed in the present work, and the economic threshold (ET) is chosen to guide the switches. That is, if the density of host (pest) population increases and exceeds the ET, then the biological and chemical tactics are applied together. Those multiple control measures are suspended once the density of host falls below the ET. Firstly, the existence and stability of several types of equilibria of switched system have been discussed briefly, and two-or three-parameter bifurcation diagrams reveal the regions of different types of equilibria including regular and virtual equilibria. Secondly, numerical bifurcation analyses show that the switched discrete system may have very complex dynamics including the co-existence of multiple attractors and switched-like behavior among attractors. Finally, we address how the key parameters and initial values of both host and parasitoid populations affect the host outbreaks, switching frequencies or mean switching frequency, and consequently the relative biological implications with respect to pest control are discussed.
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