The efficiency of the integrated protection of agricultural crops against key pests largely depends on the fact of the interaction of the applied pesticides with the species of useful fauna in the agrocenosis. Species of useful fauna constitute the natural lever for regulating the density of phytophagous species in agrocenoses, and this requires a protective attitude towards them. The multilateral analysis of the consequences of pesticide application on harmful and beneficial species has shown that predatory and parasitic species are largely recognized as being more vulnerable to these factors with toxic action. These effects could possibly be due to the fact that the biochemical mechanisms of the phytophagous species, unlike those of the representatives of the useful fauna, are evolutionarily better adapted and disposed to the process of eliminating from the body the negative effects caused by the action of toxic compounds, in the framework of plants host. The ethological particularities of the predators related to the increased mobility in search of the victim also create the increased degree of contact with the applied insectoacari-cides. This is also the cause of their increased mortality. At the same time, the individuals of the useful species, which survived as a result of the application of chemical treatments, they face the increased reduction of the nutritional base and, finally, they may simply die due to the lack or insufficiency of food [1]. Thus, it is important that in order to maintain the potential of useful fauna in agrocenoses, the strategy of applying pesticides with an increased degree of toxicity must be completely revised in favor of those that are more selective with a low effect on useful fauna. This clause can be achieved, to a large extent, by the thorough analysis of the action of the pesticides included in the system. In addition to the effectiveness of pesticides against pests, an important criterion is their degree of danger to the environment, taking into account the effect of pesticides on the main components of agroecosystems, including useful fauna. The use of pesticides, which would tolerate the “activity” of beneficial fauna, is an element of conservative biological control which, in turn, leads to a numerical reduction in the chemical treatments required to keep pests below the economic damage threshold. It is important that along with the application of phytosanitary products, the degree of tolerance of useful fauna representatives to them should also increase, thus increasing the resistance of entomoacarifage species populations to the applied toxic factors, something reported in the communications of many researchers. The selection, multiplication and practical application of useful arthropod lines with a high degree of resistance to pesticides as biological control agents in the integrated protection of agricultural crops from pests is important and promising. [2]. Previously, such evaluations were carried out on the analysis of fauna useful for apple culture. The purpose of this work is to evaluate the sensitivity to insecticides belonging to diffe-rent mechanisms of action (AI), on entomoakarifags in the agrocenosis of the plum orchard.