Chemical protection of the onion from phytophages in the Right-Bank of the Forest-Steppe of Ukraine

Goal. To monitor the species composition of the harmful entomocomplex of onions and determine the effectiveness of modern insecticides in different ways of their application (spraying and seed treatment). Methods. Laboratory and field studies were carried out according to generally accepted methods and using classical methods of entomology; vario-statistical analysis. Results. It has been established that on the crops of the onion of the onion in the right bank forest-steppe of Ukraine, 11 species of phytophages are dominated by the most numerous: Delia antigua Mg., Trips tabaci Lind., Ceuthorrhynchus jakovlevi Schultze and Eumerus strigatus Fall. Species composition of pests on the hybrids of antelope F1, Dyton F1, Bank F1 and Halkodon varieties and the globe was the same, but the number was significantly different. The hybrids of the foreign selection, the size of the onion flies was at a level of 3.5—12.7 l./р., And on the varieties of Halcodon and the globe — 5.1—16.6 l./р. It was investigated that the technical efficiency of onion seed disinfectants was: Cruiser 350 FS, because — 79.3% and Celeste Top 312.5 FS, TH — 71.7%. The greatest technical efficiency of the tested insecticides against the dominant phytophages with double spraying of onion crops was provided by Engio 247 SC, KS — 78.5% and Lannat, 20 RK — 74.6%. Conclusions. It was found that the use of seed disinfectants drugs Cruiser 350 FS, because (0.15 l/t) and Celest Top 312.5 FS, TN (0.1 l/t) and two treatments with Engio 247SC, KS (0.18 l/ha) provide protection of onion crops from pests and their control, both in the initial stages of development and during the growing season.