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Introduction Chapter ¢ñ : The Overview of Biodiversity Conservation for the Pest Management in Agroecosystems 1 Introduction 2 The biodiversity in agricultural ecosystems 3 The contributions and mechanisms of biodiversity 4 Habitat management and biological control 5 Conclusion Chapter ¢ò : The Potential of Infochemicals in Integrated Pest Management 1 Introduction 2 Materials and methods 3 Results 4 Discussion Chapter ¢ó: Beneficial Effect of Associating Pea to Wheat: A Laboratory Approach on Aphid and Related Predator Behavious 1 Introduction 2 Methods and materials 3 Results 4 Discussion Chapter ¢ô : Mixing Crops and Intercropping as Efficient Aphid Control Strategies: Illustration with Pea-Wheat Association 1 Introduction 2 Materials and methods 3 Results 4 Discussion