Introduction. In the Republic of Moldova, walnut culture has grown in the last decades (about of 14000 ha.). Currently, no detailed studies have been carried out on the harmful effects produced by Zeuzera pyrina L in the walnut orchard. This problem can be solved by clarifying the phenology of this pest in the agroecosystems of the industrial walnut and apple orchards. Five decades ago, against Z. pyrina L. in the apple crops, classic methods of combat were used, at different stages of its development, by cutting and burning the attacked branches. Another control method was the poisoning method by introducing cotton balls moistened in a 10% suspension of 12% hexachloran dust or 10% thiophos emulsion [3]. And three decades ago, organophosphorus preparations products were used against it during the mass flight of butterflies, the egg-laying and the hatching of the larvae periods. Poisoning of the larvae in the galleries was carried out with the products carbofos, antio, metafos and cidial [4]. Currently, in the practice of walnut protection against this pest, Actara WDG and Decis Profi VDG insecti-cides are used. In the world practice, 7 species of pathogens from 4 genera (Bacillus, Beauveria, Hir-sutella and Metarhizium) and 12 species of arthropods (parasitic insects and spiders) together with nematodes are known, they regulate the pest at different ontogenetic stages. The parasite species Elachertus nigritulus Zett (Hymenoptera: Eulophidae), is frequently used as a biologi-cal agent [2]. Purpose. The goal of this research was development of procedures which combat the branch borer by using pheromone traps and biological agents. The objectives of the research consist of monitoring the population of Z. pyrina L. in traps with male sex pheromone, under the influence of the weather conditions of the year 2022. Also we will compare the results in relation to the phenological calendar of development of the pest; and finally, the complex of parasitic insects that regulate it will be highlighted.