Estimation of biological efficacy of biological methods for plant protection against main corn pests

The high yield and wide use of corn for both food and valuable feed for farm animals contribute to the wide spread and increase of its production. According to a number of sources, there are more than 200 types of pests and 28 types of pathogens that injury corn. The development of technologies for organic and environmentally friendly crop production both in the world and in Russia predetermines a particular interest in biological plant protection. This study discusses promising methods of biological control of the main corn pests, based on the integrated use of pheromones, entomopathogenic preparations and the release of parasitic hymenoptera Trichogramma evanescens West and Habrobracon hebetor Say. Seasonal dynamics of flying and the number of Helicoverpa armigera Hbn. and Agriotes tauricus Heyd. were determined by pheromone traps. The record of the number of the Ostrinia nubilalis Hbn. caterpillars was carried out on 15 plants on different plots, repeated 6-7 times...