农田景观是由人类赖以生存的作物和非作物生态系统共同组成的景观镶嵌体，这种景观镶嵌体的结构及演变过程驱动着害虫-天敌系统的动态过程。本项目拟以最新的生境管理理论为指导，以山东禹城麦田麦蚜-天敌系统为研究对象，通过对农业景观复杂性梯度和演变过程与麦蚜发生危害数据的整合分析，结合卫星遥感影像，解析农业景观复杂性的组成及变化规律，建立天敌对害虫的控害作用的评价系统，研究农业景观变化对天敌控害作用的影响，阐明农业景观格局变化对麦蚜-天敌系统的影响，定量评估麦蚜种群危害过程和天敌控制作用等功能特征，探讨农田景观复杂性与麦蚜-天敌系统的关系。从而在理论上分析景观格局及复杂性对生物多样性的影响，揭示农业景观变化对昆虫种间关系的作用机制；在实践上为利用农田景观格局控制害虫发生提供新的途径与方法。

Farming activities have posed strong impacts on the biodiversity in agricultural landscape for centuries. However, the agricultural landscape composed by crop and non-crop habitats have evolved into landscape mosaic, which also have a strong effect on the distribution and dynamics processes of pest-natural enemy system. In the present research, we selected multiple landscape sites, which form a continuous gradient of landscape complexity in Yucheng Comprehensive Experiment Station, Chinese Academy of Sciences. The effects of landscape complexity and spatial scale on cereal aphid-natural enemy system are examined based on theory of landscape ecology and habitat management. In addition, the biological control indices of natural enemy are established, which is used to estimate the ecological services of parasitic wasp or predator respectively in fields. Then, we analyze the influence of landscape pattern and spatial scale on population dynamics of cereal aphid and their natural enemy. Finally, we establish mathematic model and evaluate the biological control service of natural enemy on cereal aphids, which are used to achieve sustainable pest control by landscape modification. The research landscape pattern and biodiversity can reveal the interspecific relationship and mechanism in theory, which can provide new approaches and methods to control insect pests by agricultural design in practice.