OLMA BOG‘LARIDA ODDIY O‘RGIMCHAKKANAGA (TETRANYCHUS URTICAE KOCH) QARSHI YANGI KIMYOVIY PREPARATNING BIOLOGIK SAMARADORLIGI

Abstract

Over 30 specialized and polyphagous species of natural enemies of common spider mites have been identified in the agrobiocenoses of orchards, while only some of them are used in practice. Therefore, we have studied bioecological characteristics of the common spider mite, its distribution in the agrobiocenosis of orchards, ‘entomophagy-host’ relationships, assessment of the effectiveness of entomophagy in monitoring their numbers, which formed the grounds to explore improvement of adaptation to common spider mites. The integrated protection system has gained great scientific and practical importance. However, despite the fact that seed gardens are highly affected by phytophagous mites, their species composition, systematic analysis, development, bioecological features, natural interaction, and methods for managing their numbers have not been fully investigated. Akramite 48% (bifenazate) s.c. (0.75 l/ha) and Karache 10% (lambda-cyhalothrin) em.c. (0.4 l/ha) taken for the experiment, were subject for observation and analysis starting from day 3. According to findings, with a new drug of Akramite 48% (bifenazate) s.c. biological efficiency had reached 88.4%, and 81.8% by the 7th day. By the 14th day of our observation, biological efficiency was 72.3%, and by the 21st day – 67.8%. From the 21st day of the study, the number of the pest began to increase again. It was proven that timely agrotechnical measures in late autumn and early spring, as well as the use of chemicals that are less toxic to the environment and good insects during the flowering period and growing season, can save crops in the combat against common spider mites (Tetranychus urticae Koch) in fruit orchards.