Diseases of the respiratory system occupy a priority position among the non-infectious pathology of young animals. The greatest economic damage to farms of various types is caused by bronchopneumonia. The treatment of this disease brings high economic costs, in contrast to preventive measures, and especially aerosol administrations of herbal preparations. In this regard, the study of the nature and degree of the effect of herbal preparations on the animal and the improvement of preventive measures are an urgent topic of research. The authors have carried out a large amount of work on clinical research, morphology, biochemistry and immunology of blood. Based on the studies carried out, the authors have established a positive preventive effect, which is directly related to the activation and strengthening of immunity. Experiments carried out on the prevention of bronchopneumonia in calves using biostimulants of plant origin have shown high efficiency. After all treatment cycles, no culling of animals was observed, which was noted in the control group. The results obtained make it possible to recommend the aerosol use of Echinacea purpurea tincture in a dose of 3 ml per 1 m3 of the chamber for the prevention of bronchopneumonia and anemia, as well as for maintaining immunological homeostasis and the formation of the defenses of the body of calves in the farms.