Tang, Sanyi, Xiao, Yanni and Cheke, Robert A. ORCID: https://orcid.org/0000-0002-7437-1934 (2008) Multiple attractors of host-parasitoid models with integrated pest management strategies: eradication, persistence and outbreak. Theoretical Population Biology, 73 (2). pp. 181-197. ISSN 0040-5809 (doi:10.1016/j.tpb.2007.12.001)

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Abstract

Host-parasitoid models including integrated pest management (IPM) interventions with impulsive effects at both fixed and unfixed times were analyzed with regard to host-eradication, host-parasitoid persistence and host-outbreak solutions. The host-eradication periodic solution with fixed moments is globally stable if the host's intrinsic growth rate is less than the summation of the mean host-killing rate and the mean parasitization rate during the impulsive period. Solutions for all three categories can coexist, with switch-like transitions among their attractors showing that varying dosages and frequencies of insecticide applications and the numbers of parasitoids released are crucial. Periodic solutions also exist for models with unfixed moments for which the maximum amplitude of the host is less than the economic threshold. The dosages and frequencies of IPM interventions for these solutions are much reduced in comparison with the pest-eradication periodic solution. Our results, which are robust to inclusion of stochastic effects and with a wide range of parameter values, confirm that IPM is more effective than any single control tactic.

Item Type:	Article
Additional Information:	[1] First available online: 8 December 2007. [2] Published in print: March 2008. [3] Research supported by National Natural Science Foundation of China (NSFC 10701062, and 10726040)
Uncontrolled Keywords:	Nicholson-Bailey model, IPM, economic threshold, impulsive difference equations, coexistence, host outbreak
Subjects:	S Agriculture > S Agriculture (General) Q Science > QA Mathematics S Agriculture > SB Plant culture
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > Natural Resources Institute Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
Related URLs:	Publisher
Last Modified:	28 Jan 2020 10:53
URI:	http://gala.gre.ac.uk/id/eprint/2162

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