The present article provides a brief analysis of phytosanitary importance of different bark beetle species of the genus Ips, related with regulated products. It lists beetle species of this taxonomic group of quarantine and special phytosanitary importance, which can be found in the exported and imported forest products.

The article provides the results of studying the attractiveness of different alternatives of the synthetic sex pheromone of fall armyworm Spodoptera frugiperda. The results of the tests conducted by the Chinese specialists on the territory of the People’s Republic of China (Guangzhou) on corn crops showed that the attractiveness of the mixture produced by FGBU “VNIIKR” ((Z)-9-tetradecen-1-ol acetate (Z9-14Ac), (Z)-7-dodecen-1-ol acetate (Z7-12Ac), (Z)-11-hexadecen-1-ol acetate (Z11- 16Ac)) is not inferior to the reference industrial samples provided by the Chinese side.

The study of external morphology of the second-instar larvae of chilli thrips Scirtothrips dorsalis Hood (Thysanoptera, Thripidae) is presented. As a result of the study of the larvae collected from photinia plants for planting from Italy, as well as the study of research papers, the possibility of identification at the larval stage has been confirmed. The main morphological characteristics of the species have been identified and photographs of the main diagnostic characteristics are presented. In addition to the characteristics indicated in the diagnostic key of Vierbergen et al., other morphological peculiarities of the species have been identified, such as campaniform sensilla on the X abdomen tergite and sense cones on the II segment of antennae. However, these data require completion and clarification, because without sufficient amount of comparative material, it is impossible to assess how much these characteristics change within a species and a genus.

Stem canker of sunflower is a harmful disease in the countries of industrial cultivation of seed and commercial sunflowers. In the last decade, new species of Diaporthe genus have been described on the sunflower, which have little differences in morphological characteristics. Therefore, it is necessary to develop molecular genetic methods that would allow to conduct research in short terms and provide high accuracy of the pathogen identification. During the study, the data on the pathogen and molecular genetic diagnosis methods available in international practice have been collected and analyzed. A list of species of Diaporthe genus registered on the sunflower has been made. The most variable regions of the genome have been identified.

The article describes a herbological expedition to the districts of Tomsk Oblast and Altai Krai which took place in August 2020 within the research project, as well as the results of this expedition. In field conditions, the researchers studied the spreading, ecological and biological characteristics of weed plants, including the quarantine and invasive plant species, described the geobotany of agrocenoses and collected herbarium materials. Observations of Cuscuta spp. and Cyclachaena xanthiifolia (Nutt.) Fresen. were carried out in nature.