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Dynamics of a Stage Structure Pest Control Model with Impulsive Effects at Different Fixed Time

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  • Bing Liu
  • Ying Duan
  • Yinghui Gao

Abstract

Many existing pest control models, which control pests by releasing natural enemies, neglect the effect that natural enemies may get killed. From this point of view, we formulate a pest control model with stage structure for the pest with constant maturation time delay (through-stage time delay) and periodic releasing natural enemies and natural enemies killed at different fixed time and perform a systematic mathematical and ecological study. By using the comparison theorem and analysis method, we obtain the conditions for the global attractivity of the pest-eradication periodic solution and permanence of the system. We also present a pest management strategy in which the pest population is kept under the economic threshold level (ETL) when the pest population is uniformly permanent. We show that maturation time delay, impulsive releasing, and killing natural enemies can bring great effects on the dynamics of the system. Numerical simulations confirm our theoretical results.

Suggested Citation

  • Bing Liu & Ying Duan & Yinghui Gao, 2009. "Dynamics of a Stage Structure Pest Control Model with Impulsive Effects at Different Fixed Time," Discrete Dynamics in Nature and Society, Hindawi, vol. 2009, pages 1-15, February.
    • Handle: RePEc:hin:jnddns:392852
    DOI: 10.1155/2009/392852
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