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Global Stability in a General Impulsive Biological Control Model with Harvest

Sapna Nundloll 1 Ludovic Mailleret 2 Frédéric Grognard 1
1 COMORE - Modeling and control of renewable resources
LOV - Laboratoire d'océanographie de Villefranche, CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : In this paper, the effects of periodic partial harvesting of a continuously grown crop on augmentative biological control are analysed. Partial harvesting can remove a proportion of both pests and biological control agents, so its influence on the control efficiency cannot be a priori neglected. An impulsive model consisting of a general predator-prey model in ode is used. It is augmented by a discrete component to depict releases of biological control agents and the periodic partial harvesting. A stability condition for pest eradication is expressed as the minimal value of the budget per unit time to spend on predators. We consider the partial harvesting period to be fixed so that the only manipulated variable is the release period. One period is taken as the integer multiple of the other. We show that when the releases are carried out more often than the harvests, the release period influences the minimal budget. Conversely, there is no effect on this budget when releases take place as often as or less frequently than harvests.
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Sapna Nundloll, Ludovic Mailleret, Frédéric Grognard. Global Stability in a General Impulsive Biological Control Model with Harvest. 17th IFAC World Congress, Jul 2008, Seoul, South Korea. pp.15517-15522, ⟨10.3182/20080706-5-KR-1001.02624⟩. ⟨hal-01091822⟩

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