EN
The review concerns the latest theories of biological control of pests and weeds and protection of benefitial and neutral species. Registration requirements to microbial biopreparations, introduction and other biological interventions are considered. Article explains why in recent years the biological and chemical controls are not opposite each other as strongly as in early projects. The trial of field applications of local strain of fungus Beauveria bassiana against Melolontha melolontha is described and the elucidation that utilization of local species to plant protection is less risky was given.