Topchiy T. The characters of the winter wheat protection from sucking insect pests in the Central Forest-Steppe in Ukraine

Objects of research - – varieties and breeding lines of winter soft wheat; cereal aphids, cereal bugs, wheat thrips, cicadas, modern insecticides. Subject of research: improvement of system of integrated protection of winter wheat against sucking insect pest taking into account the level of varieties' resistance. Methods: : observations, laboratory and field tests, statistical method. Scientific novelty of the results of the research. For the first time in conditions of Central Forest- Steppe in Ukraine there were studied in details dynamics of sucking insect pests populations and their harmfulness for different by resistance to the pests varieties of winter wheat dependently on action of the biotic, abiotic and anthropogenic factors. It was defined more precisely species composition of entomophages and their role in regulation of the sucking insect pests numbers; carried out estimation of the resistance level of 51 varieties of winter wheat and breeding material against some sucking species of phytophages. The method of estimation of the varieties' resistance by the wheat thrips colonization of plants was improved. The influence of injury of different varieties of winter wheat from the sun bug and wheat thrips on quality of their grain was studied. Effectiveness of modern insecticides by means of methods of “seed dressing“ and spraying of fields of winter wheat varieties possessing different level resistance against sucking phytophages was evaluated. Field of application – agriculture, plant protection.