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Firstly, a fixed\u2010time 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\u20101 is given. Then, a state\u2010dependent stochastic ecosystem with IPM strategy is proposed. By employing the numerical simulations, the effects of ambient noise intensity on pest\u2010outbreak are discussed. The result shows that there is a close relationship among the frequency of pest\u2010outbreak, ET, the environmental perturbation intensity, and control measures. This study helps us to understand the impact of random factors on pest\u2010outbreak 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.<\/jats:p>","DOI":"10.1155\/2019\/8326164","type":"journal-article","created":{"date-parts":[[2019,4,14]],"date-time":"2019-04-14T23:31:51Z","timestamp":1555284711000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Models to Assess the Effects of Nonsmooth Control and Stochastic Perturbation on Pest Control: A Pest\u2010Natural\u2010Enemy Ecosystem"],"prefix":"10.1155","volume":"2019","author":[{"given":"Xuewen","family":"Tan","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5635-1534","authenticated-orcid":false,"given":"Wenjie","family":"Qin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guangyao","family":"Tang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9610-0289","authenticated-orcid":false,"given":"Changcheng","family":"Xiang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xinzhi","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2019,4,14]]},"reference":[{"key":"e_1_2_9_1_2","volume-title":"Integrated Pest Management for Walnuts","author":"Flint M. 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