Despite the importance of micronutrients, studies of mineral nutrition management in seed production are scarce. The objective of this work was to evaluate the copper effect at different doses and application times on seed yield of BRS RB331 Ipyporã. For this experiment, two open-air pot trials were conducted at Embrapa Gado de Corte, in the 2016/17 crop. For both tests treatments were represented copper doses and application times. It was observed that the seed production of hybrid BRS RB331 Ipyporã was not affected by treatments with copper. Copper did not affect seed viability of the hybrid BRS RB331 Ipyporã.