Alieksieieva S. Biological ground of the system of protection of sugar beet plants in seed plots against the sheet beet aphid (Aphis fabae Scop.) in the Central Forest-Steppe in Ukraine.

Objects of research - sheet beet aphid and its injuriousness, seed-breeding plots of the sugar beet, modern insecticides. Purpose - to improve the system integrated protection of seed-breeding plots of the sugar beet against a sheet beet aphid with the count of its biological features and technologies of cultivation of culture in the Central Forest-Steppe in Ukraine. Methods: field, laboratory, statistical. Scientific novelty - in a zone of a sufficient moistening of the Central Forest-Steppe of Ukraine in modern conditions for the first time more accurate defined species and subspecies structure of complex of black aphids "Aphis fabae" and their trophic connections; features of biology and seasonal dynamics of population, in dependence on abiotic factors are investigated. It was ascertained the straight proportional dependence between the hydrothermal index and the sheet beet aphid colonization of plants of sugar beet of the first and second year of growing. The species composition of entomophages of an aphid on seed plants of sugar beet and their role in a regulation of number of a phytophagan is specified. The expediency of application against the pest of agrotechnical methods is proved at cultivation seed plants of sugar beet (times of planting of root crops, a saturation of a crop rotation by sugar beet and their seed plants, a fertilizer system). It has been studied efficacy of modern insecticides against a sheet beet aphid when using is determined by different ways. High technical efficacy at processing root crops of sugar beet was provided with preparations Cruiser 350 FS, Prestige 290 FS and Gaucho, 70 % (92, 4-97,0 %), and at spraying plants - Engio 247 SC, Karate Zeon 050 CS. and Nurel D, 55 % (90,8-95,2 %). Field of application - agriculture, plant protection.