Agriculture and forestry

Pinchuk Natalya Vladimirovna – Candidate of Agricultural Sciences, Associate Professor of the department of botany, genetics and plant protection, Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna st. 3, e-mail: pnv@vsau.vin.ua).

Kovalenko Tetyana Mefodiivna – Candidate of Agricultural Sciences, Associate Professor of the department of botany, genetics and plant protection, Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna st. 3 e-mail: ktm@vsau.vin.ua).

The article reflects the results of studying the peculiarities of the development and formation of the number of a dangerous phytophage of black currant - the kidney mite (Cecidophyopsis ribis Westw.). A theoretical generalization of the prevalence of the pest in the research area, the study of the issue of its development cycle and the impact on the formation of the yield of black currant is made. The results of research by a number of authors on the relevance of research in this direction are summarized, highlightingrelevant aspects of further research of measures to control and limit the number of kidney mites in modern intensive agrophytocenoses of black currant in Ukraine.

The results of a general assessment of the influence of climatic factors during the research period on the favorableness of both the growth and development of black currant plants and fluctuations in the number of kidney currant mites, taking into account the hydrothermal regime of the vegetation period of plants and taking into account the biological characteristics of the life cycle of the phytophage, are presented. Based on the assessment of the population of the collection nursery of blackcurrant varieties, which includes 40 varieties of various ecological and geographical origin, the presence of sources of genotypic resistance of blackcurrant varieties to the kidney currant mite was studied, and conclusions were drawn about the differentiation of the studied varieties according to their prospects of use for the formation of resistant to the number of this pest cenoses in order to limit its number and reduce the level of pesticide load with obtaining berry products suitable for fresh consumption.

The effectiveness of six variants of application of three acaricides, which are widespread in the practice of protecting black currant, in the format of three variants of the working concentration of the solution for each of the preparations has been investigated. The efficiency and feasibility of using each acaricide on a variety with minimal resistance to this phytophage and on the basis of a preliminary study of the population of the collection varieties by the pest and a decrease in the yield level of each of them in comparison with the level of population and damage control have been determined. On the basis of the long-term evaluation of using various compositions of the studied acaricides, the most effective option for the use of the acaricide Nissoran (Dr. Hexythiazox, 100 g / kg) with a working solution concentration of 0.6%, which ensures the maximum safety of the crop on the most unstable to the pest variety of black currant, has been established providing an increase in yield to control water treatment at the level of 229.5%. The attention has been focused on the prospect of further research in the option of studying the effectiveness of combining the use of classical acaricides with a number of biological products, as well as against the background of the use of foliar dressing of black currant with chelated micronutrient fertilizers in the context of the same collection of crop varieties corresponding to certain strategies for limiting the number of phytophages of agricultural crops, taking into account modern agrotechnological agricultural cultivation approaches.

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