Ryabtchook P. Improvement of weed control on winter wheat in Northern Forest Steppe in Ukraine

Research objectives are studding the process yield changing impacted by weeds infection which formed in the wheat fields effecting by pre- crop, type of tillage and herbicides. Research goal- to identify impact of pre- crop, type of tillage an herbicide on weed density level and wither wheat yield. In Northern Forrest- Steppe and improvement of assortments of chemicals for weeding by mean the registration of herbicide monitor, 75% w.g. Research methods - field, laboratory, statistical. Scientific value and correspondence with modern demands: identification of weeds' damage at winter wheat fields and develop-ment of its control when wheat growing after different pre- crop, par-ticularly after early harvested sugar beet, soil- conservation technol-ogy and herbicides use Fir the first time was studied the efficiency of herbicide monitor, 75 % w.g, using in ratio 13-26 g/ha and control 85-95% of Elytrigia repens L. It helps to change control strategy on crop rotation, starting for winter wheat. The field on desertion research results application agricultural production, particularly, crop hus-bandry.