Proposed conceptual approach to the problem of informativeness of pheromone monitoring. Integrating information on pheromone communication, ethology and population dynamics Laspeyresia pomonella L., Ostrinia nubilalis Hb., Mamestra brassicae L., Phthorimaea operculella Zeller. Results electrobiological studies of reactions of males in natural and artificial pheromones indicate that the synthetic pheromone for olfactory value for males sufficiently mimics the smell of the pheromone of females and is included in the natural pheromone communication channels in a competitive environment. The structure of the populations of Lepidoptera pests in the degree of sensitivity of males to pheromone of females and the production of pheromone by females heterogene. Distantly settings pheromone communication is limited in the range of 30-60 m. Trapping of adults feromonami traps is probabilistic, determined by competition of natural and synthetic pheromones. Тhe abundance of the species, its behavior and the spatial distribution of the agro-ecosystem. In agrocenoses of perennial and 180 annual crops, the informativeness of pheromone monitoring has its own specific features due to the different rates of formation of spatael structures and pheromone monitoring, Lepidoptera pests, population dynamic