RESEARCH ON THE SELECTIVITY AND THE EFFICACY OF HERBICIDES IN CONTROLLING WEEDS FOR THE MAIZE CROP

The maize is an important crop, affected by many of the weeds that, fortunately can be effectively controlled by specific herbicide applications. The main objective of this paper is to investigate the selectivity and the efficacy of five herbicides applied in different stage: pre-emergence (BBCH 00-09), early post-emergence (stage of development for maize crop 2-4 leaves; stage of development of weeds 1-3 leaves) and post-emergence (stage of development for the maize crop 4-6 leaves and stage of development for mono weeds BBCH 11-14 and dicotyledons weeds - BBCH 11-15) for the control of the annual and perennial monocotyledonous and dicotyledonous weeds from the maize crop. The paper present the results obtained for the herbicide treatments: Dual Gold (s-metalaclor); Adengo (isoxaflutol 225 g/l + tiencarbazon-metil 90 g/l + ciprosulfamide (safener) 150 g/l; Adengo [isoxaflutol 225 g/l + tiencarbazon-metil 90 g/l + ciprosulfamide (safener) clopiralid] + Lontrel (300 g/l clopyralid); Nicogan 40 (40 g/l nicosulfuron) + Lontrel (300 g/l clopyralid) + Tomigan (250 g/l fluroxipir). The study was performed in the experimental fields on cambic chernozem soil of the National Agriculture Research and Development Institute from Fundulea in the years 2015-2017.