Models to Assess the Effects of Nonsmooth Control and Stochastic Perturbation on Pest Control: A Pest-Natural-Enemy Ecosystem

Author:

Tan Xuewen12,Qin Wenjie34ORCID,Tang Guangyao5,Xiang Changcheng5ORCID,Liu Xinzhi6

Affiliation:

1. School of Mathematics and Computer Science, Yunnan Minzu University, Kunming 650500, China

2. College of Mathematics and Information Science, Shaanxi Normal University, Xi'an 710062, China

3. Three Gorges Mathematical Research Center, China Three Gorges University, Yichang 443002, China

4. Laboratory for Industrial and Applied Mathematics, York University, Toronto M3J 1P3, Canada

5. Department of Mathematics, Hubei Minzu University, Enshi 445000, China

6. Department of Applied Mathematics, University of Waterloo, Waterloo N2L 3G1, Canada

Abstract

This paper investigates the impact of the threshold control strategy and environmental randomness on pest control. Firstly, a fixed-time impulsive stochastic ecosystem with IPM strategy is proposed, where the local and global existence of positive solution and the boundedness of expectation are discussed in detail. Moreover a sufficient condition for the extinction of the pest population with probability-1 is given. Then, a state-dependent stochastic ecosystem with IPM strategy is proposed. By employing the numerical simulations, the effects of ambient noise intensity on pest-outbreak are discussed. The result shows that there is a close relationship among the frequency of pest-outbreak, ET, the environmental perturbation intensity, and control measures. This study helps us to understand the impact of random factors on pest-outbreak frequency by theoretical derivations and numerical simulations; the results have directive significance in the design of an optimal control strategy for the department of ecological agriculture.

Funder

National Natural Science Foundation of China

Publisher

Hindawi Limited

Subject

Multidisciplinary,General Computer Science

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