Technical efficiency of tank mixtures of herbicides in crops of winter wheat after non–steam predecessors in the conditions of the Northern Steppe of Ukraine

Goal. To establish the biological effectiveness of herbicides and their tank mixtures for the protection of winter wheat crops from weeds in the Steppe of Ukraine. Methods. General scientific, the main of which were: field; measuring and weighing; variance and correlation. The Institute of Grain Crops (IGC) of NAAS of Ukraine studied the biological effectiveness of herbicides against the background of non–steam precursors (stubble, oats, sunflower), the experimental scheme included 17 options for the use of drugs and their tank mixtures. Results. It is proved that the complete and 100% control of weeds is provided by the tank mixture of herbicide Dialin super — 0.8 l/ ha in combination with the growth regulator Gulliver stimulus — 500 ml/ ha, 21.1 pieces/ m² of weeds are destroyed here, with of which 16.8 pieces/ m² were root–sprout perennials (field birch (Convolvulus arvensis L.), pink field thistle (Cirsium arvense L.), Tatar milkweed (Lactuca tatarica L.)). The maximum grain yields were provided by the plots where the tank mixture of dialen super — 0.8 l/ ha + PPP Gulliver stimulus — 1.0 l/ ha — 6.4 t/ ha was applied; Dialin super — 0.8 l/ ha + PPP Gulliver stimulus — 1.5 l/ ha — 6.1 t/ ha and Dialin super — 0.8 l/ ha + PPP Peram — 200 ml/ ha — 6.0 t/ ha, this can be explained mainly by the low level of weediness of the field after treatment with drugs, namely the low biomass of weeds 1.0—3.1 g/ m² while in the control and application of growth regulators they were significantly greater and were 59.6 and 20.7 g/ m², respectively. Conclusions. Complete and 100% control of weeds provides a tank mixture of herbicide Dialin super — 0.8 l/ ha in combination with the growth regulator Gulliver stimulus — 1.0 l/ ha resulting in a maximum wheat yield — 6.4 t/ ha and quality indicators grains.