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Dynamical behavior of Volterra model with mutual interferenceconcerning IPM

Published online by Cambridge University Press:  15 February 2004

Yujuan Zhang
Affiliation:
Department of Mathematics, Anshan Normal University, Anshan, Liaoning 114005, P.R. China. yujuanz2000@yahoo.com.Department of Applied Mathematics, Dalian University of Technology, Dalian, Liaoning 116024, P.R. China.
Bing Liu
Affiliation:
Department of Mathematics, Anshan Normal University, Anshan, Liaoning 114005, P.R. China. yujuanz2000@yahoo.com.
Lansun Chen
Affiliation:
Department of Applied Mathematics, Dalian University of Technology, Dalian, Liaoning 116024, P.R. China.
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Abstract

A Volterra model with mutual interferenceconcerning integrated pest management is proposed and analyzed. Byusing Floquet theorem and small amplitude perturbation method andcomparison theorem, we show the existence of a globallyasymptotically stable pest-eradication periodic solution. Further,we prove that when the stability of pest-eradication periodicsolution is lost, the system is permanent and there exists alocally stable positive periodic solution which arises from thepest-eradication periodic solution by bifurcation theory. When theunique positive periodic solution loses its stability, numericalsimulation shows there is a characteristic sequence ofbifurcations, leading to a chaotic dynamics. Finally, we comparethe validity of integrated pest management (IPM) strategy withclassical methods and conclude IPM strategy is more effective thanclassical methods.

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Type
Research Article
Copyright
© EDP Sciences, SMAI, 2004

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