The largest attack was recorded to control plots where there is no treatment was applied. The density of plants ranged between 116 and 118 plants/plot, respectively over 65% of saved plants by treatment on seeds with both insecticides. In case of spraying insecticides in vegetation, their effect were insignificant, 31 plants/plot density and 17% saved plants in case of Calypso 480 SC and 16.75 plants/plots density and 9.31% saved plants in case of Decis Mega. The largest yields was of 7,778 kg/ha at insecticides variant with the best effectiveness and density of 65,690 plants/ha. Insecticides showed no influence on chemical composition of seeds at harvesting. But due to high temperatures and drought, the maize seeds accumulated: 12.31% protein; 70.18% starch; 5.05% oil; 1.46% ash; 5.24% fibre.