Aphids are primary pests of peach in early organic field. In order to know the relationship between aphids and their natural enemies and the ecological management, we design three ecological control mode, which are the treatment of planting garlic+mulch plastic film, the treatment of planting 100% alfalfa and the treatment of planting 70% alfalfa+30% Lagopsis supine. We investigate the insect community, analyse the natural enemies of aphids and the effect of ecological management. The results showed the main natural enemies of Myzus persicae (Sulzer), Hyalopterus amygdali (Blanchard) and Tuberocephalus momonis (Matsumura) were Propylea japonica (Thunberg), Orius sauteri (Poppius) and Coccinella septempunctata (Linnaeusaeus). There was negative relationship between aphids and natural enemy/pest index. The natural enemy/pest index and evenness of natural enemies was significantly higher and the abundance of M. persicae, H. amygdali and T. momonis were significantly lower in the treatment of planting 100% alfalfa and in the treatment of planting 70% alfalfa +30% L. supina than those of control treatment. It is benefit to control green peach aphids with planting 100% alfalfa and it is benefit to control M. persicae, H. amygdali and T. momonis with planting 70% alfalfa+30% L. supina.
