BIOLOGICAL EFFECTIVENESS OF PEST CONTROL OF ORNAMENTAL TREES OF THE LEGUMINE FAMILY

Abstract

In Uzbekistan, the issue of nature conservation and environmental improvement has become one of the leading directions of state policy. Therefore, in recent years, much attention has been paid to plant protection. The plant world is considered the most important resource in human life, and when used wisely, it becomes an inexhaustible source of raw materials. Plant diversity is an important source of life, an actual and potential resource for all countries. Plants are important in the sustainable development of society, in solving its economic, cultural, aesthetic, and environmental needs. Sucking pests of ornamental trees cause serious damage and lead to the death of trees. The reasons for the sharp increase in the number of pests, bioecological characteristics, distribution area, level of harmfulness and measures to combat it have not been sufficiently studied. Implementing out current scientific research is one of the urgent tasks of our time. For this reason, it is necessary to study control measures and develop a system of environmentally friendly and effective measures against these pests.
According to the results of the study, the biological effectiveness of the entomophage Chrysoperla carnea, distributed against Aphis craccivora, damaging Styphnolobium japonicum, was high and in a ratio of 1:10 85.9%, in a ratio of 1:15 70.3%, in a ratio of 1:20 was 57.2 % biological effectiveness. In 2022, the areas of distribution of entomophages were controlled, and the following year there was no need for the spread of entomophages in these territories.