Abstract
Within pests (insects), Lepidoptera, by species composition and harmfulness, are in the front row. As you know, one of the biogenic factors in nature, they have a serious impact on the yield of natural pasture grasses and saxaul. They feed on leaves, stems, roots, flowers and seeds of plants, and prevent the reproduction of saxaul. In this regard, it is now necessary to study the biological characteristics of shells that feed on saxaul, determine the phenology, harmfulness, and organize measures to protect against pests. For many reasons (seed production, agricultural engineering, etc.), it is connected with the fact that in the desert zone of South-Eastern and southern Kazakhstan, issues of increasing the area of the saxaul and protecting it from pests are being solved. One of the main reasons is an incomplete study of the species composition of insects-insects that feed on saxaul. Therefore, the study of bioecological features of pest species and their harmfulness and measures to protect the saxaul from pests is one of the urgent problems. The article deals with the study of biological features of shells that feed on saxaul, determining the phenology, harmfulness and organization of measures to protect against pests.