The research was aimed at identifying the characteristics of spatiotemporal distribution of entomophages in the herb and the aboveground layers in phytocenoses of agricultural landscape of the Northern forest-steppe of Western Siberia. Based on the analysis of the structure of entomocomplexes of phytocenoses with various types of flowering and frequency of anthropogenic successions (herbs dominated by Galéga orientalis, and adjacent phytocenoses of Vicia faba and Brassica napus), the similarity of the taxonomic composition of major entomophages and changes in the ratios in favor of phytophages in phytocenoses of cultivated crops has been shown. The close dependence of the number of insects on the hydrothermal conditions of vegetation conditions has been revealed. Biodiversity of entomocomplex in herbs has been veraciously higher, as compared to Vicia faba and Brassica napus, the total number of insects was maximum in the phytocenosis of fava beans due to the manifold increased domination of phytophages. The importance of preserving the sites with flowering plants as donors of natural entomophages has been proven. Their wide food chains ensure stabilization in the number of pests on annual crops that belong to different botanic families. The entomophagous complex underwent significant changes during migrations, carabids featured higher relative abundance in the agroecosystems of Vicia faba and Brassica napus, the level of dominance of entomophages in the herbs level remained at the level of phytocenosis of Galéga orientalis, ensuring natural regulation of phytophages population.