SENSITIVITY <i>Trogoderma graminarium</i> Ev. TO THE ACTION OF IONIZING RADIATION
The effect of different doses and gamma radiation powers on the viability of the capoe beetle Trogoderma granarium (larval stage) was studied in laboratory experiments in 2019-2020. Grain of spring barley of the Nur variety infected with a pest was irradiated on a GUR-120 installation in a dose range of 50-450 Gy (dose rate of 100, 500 and 950 Gy/h) and a dose range of 500 to 1000 Gy at a dose rate of 950 Gy/h. It was established that irradiation of a cap beetle in doses from 50 to 450 Gy at a dose rate of 100 Gy/h caused 100% mortality of larvae at doses of 350 and 450 Gy after 7 days, at doses of 100 and 300 Gy after 8 days, and at doses of 50, 150, 200, 250 and 400 only after 14-17 days. Irradiation of larvae in the same dose range, but at a power of 500 Gy/h, led to a more extended pest population mortality rate and amounted to 8 days at 400 Gy, 12 days at 200 and 300 Gy, 14 days at 350 Gy, 18 days at doses of 50, 100, 250 and 450 Gy, and at a dose of 150 Gy, mortality reached 90% on day 14 and stayed on this plateau for 9 days, which can be explained by the different age of caper beetle larvae. With an increase in dose rate to 950 Gy/h, it was noted that the dynamics of the death of larvae of the capra beetle demonstrates a long plateau at doses of 350-450 Gy at a mortality rate of 70-90%, as a result of which there was a delay in the onset of their complete death up to 20-24 days. Irradiation of the pest in the dose range of 500-1000 Gy with a radiation dose rate of 950 Gy/h had a more effective effect on the viability of caper beetle larvae: complete mortality of the larvae was observed on days 5-6. Determination of the chemical composition of irradiated grain of spring barley Nur varieties did not reveal a significant effect of ionizing radiation on the content of proteins, fat, fiber, dry matter and nitrogen-free extractive substances (BEV). The ash content was statistically significantly changed under the influence of irradiation in one direction or another, but not more than 3-6%.