Abstract: To explore the efficiency of the comprehensive application of the integrated control practices based on “green techniques”， the effect of integrated technology on the population dynamics， structure and diversity of pests in various modes were studied， and its practical effect on the production was evaluated by the method of environmental economics， and compared with those under chemical control. The results showed that the pest control efficiency in integrated prevention plot based on “green techniques” was much better than those in the control plot of conventional application， and its effect on the insect community in vegetable was reflected from the species structure， the diversity index and the distributive evenness of species， especially the dominant pest insects and predatory natural enemies. With green techniques applied in vegetable fields， the chemical insecticide application and the index of population trend of dominant pest insects were decreased greatly， the control effect of natural enemies on major insect pests was increased， the diversity index of insect was increased at the same time. The economic， social and environmental benefit per 667 m2 quarterly in ecological (green techniques) control field were added by 29791， 8063 and 10429 yuan， respectively， obviously better than those benefit in ecological control field. Thus， the scientific application of green techniques， through limited use of chemical insecticides， resumed the destroyed environment of vegetable fields and escalated the control ability of natural enemies to main insect pest， would play an important role in the ecological control of insect pests in vegetable fields.

Key words: green techniques, technical mode, vegetable fields under protected cultivation, insect pests, control efficacy, comprehensive benefits