International Journal of Mathematics and Mathematical Sciences
Volume 2013 (2013), Article ID 653080, 12 pages
Research Article

Oscillation in Pest Population and Its Management: A Mathematical Study

Departments of Mathematics and Biology, University of Utah, Salt Lake City, UT 84112, USA

Received 26 March 2012; Revised 26 November 2012; Accepted 26 November 2012

Academic Editor: H. Srivástava

Copyright © 2013 Samit Bhattacharyya and Suma Ghosh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We study the role of predation dynamics in oscillation of pest population in insect ecology. A two-dimensional pest control model (under the use of insecticides) with time delay in predation is considered in this paper. By the Hopf bifurcation theory, we prove the existence of the stable oscillation of the system. We also consider the economic viability of the control process. First we improve the Pontryagin maximum principle (PMP) where the delay in the system is sufficiently small and control function is linear, and then we apply the improved version of PMP to perform the optimal analysis of the pest control model as a special case.