THE EFFECTS OF HERBICIDES WITHIN THE PRODUCTIVE ELEMENTS OF THE SUNFLOWER

During the period of 2010-2012, within the experimental field of SCDA Simnic, an experiment has been placed, in which multiple methods of weed control have been tested in order to improve the productivity of sunflower crops: without hoeing, manually hoed twice, mechanically hoed twice, manually hoed twice + mechanically hoed twice, acetochlor 900 g/l, dimethenamid 720 g/l, pentoxamid 600 g/l, s-metolachlor 960 g/l, acetochlor 900 g/l + oxiflurfen 480 g/l, fluazifop-p-butyl 150 g/l, fluorocloridan 230 g/l. The study of the herbicides` effects upon the productivity elements has revealed that, when applying 900 g/l of acetochlor + 480 g/l oxiflurfen, the mass of 1000 grains is closer to the appliance of the crops that were manually hoed twice and then mechanically cropped twice. Most of the results of the applied herbicides had resulted in roughly the same amount of sunflower seeds : 26-27%. The lowest amount of sunflower oil resulted from applying herbicides upon the vegetation