The improvement of the technology of protecting sugar beet from weeds in the south of the Non-Chernozem region

The results of studies assessing the effectiveness of the integrated use of herbicides and growth regulators in the cultivation of sugar beets are presented. It was found that the most effective system was the fractional application of herbicides: the first treatment used Betaren Super MD, MKE at a rate of 1.30 l/ha, Lornet, BP at a rate of 0.075 l/ha, Forvad, MKE at a dose of 0.80 l/ha ha, Condor, VDG at a dose of 0.03 l/ha, the second treatment – Betaren Super MD, MKE at a dose of 1.30 l/ha, Lornet, VR at a dose of 0.20 l/ha, Forvad, MKE at a rate of 1.00 l/ha, Condor, VDG at a dose of 0.045 l/ha and the third treatment – Betaren 22, MKE at a dose of 2.00 l/ha, Lornet, VR at a dose of 0.30 l/ha, Forvad, MKE at a rate of 1.00 l/ha, Condor, VDG at a dose of 0.045 l/ha. The biological effect in regulating the number of young weeds ranged from 46 to 94 %, and of perennial weeds from 67 to 91 % according to the survey periods. The greatest effect in reducing the weight of weeds by 98 % was observed with three times the use of herbicides in combination with Epin Extra. An assessment of the economic effectiveness of herbicides revealed that they had some herbitoxic effect, the harvest deficiency from which, when compared with mechanical weed removal, was about 6 t/ha. The use of Epin Extra did not weaken the effect of herbicides, but, on the contrary, enhanced the phytocenotic potential of the crop and in this variant the herbitoxic effect was smoothed out. The highest yield of 65.5 t/ha was ensured by three-fold application of the herbicide complex together with a growth regulator.