The research took place during 2021 in Ciclova Română in Caraş - Severin County. The experimental field presented 4 treatments that had various combination of herbicides. Two herbicides were applied in each variant, because in the experimental group were present both monocotyledonous and dicotyledonous weeds (Nicogan, Dicopur, Nicogan, Ceredin, Nicogan, Cliophar). The degree of weeding was high, the quantitative numerical counting showed a number of 92.95 plants/m2. In the experimental variants were present problem weed species (Sorghum halepense, Cirsium arvense, Rubus caesius, etc.). 14 days after the application the highest efficacy of the phytosanitary products was registered. Their efficacy decreased four months after application, as some species either regenerated or re-weeded due to the staggered germination of target weeds. The weeds, present in the corn crop, were very well controlled by the associated application of the herbicide Nicogan and Cliophar, ensuring protection of the crop until harvest. [ABSTRACT FROM AUTHOR]