Use of Atrazine and Imazetapir in the control of infestation of Capeta Grass (Sporobulus indicus) in Ruziziensis (Brachiaria ruziziensis)

Abstract

Ruziziensis (Brachiaria ruziziensis) is a forage with high acceptance by animals, and can be indicated for rearing and fattening cattle, haymaking and livestock farming integration. Capeta grass (Sporobulus indicus) is a weed that is difficult to control and an indicator of pasture degradation. The experiments were carried out in a randomized block design (DBC) in a 2 x 4 factorial scheme, the first factor with (0, 50, 100 and 150% of the commercial dosage, 200 g/ha) of imazetapyr and the second factor with (0 , 50, 100 and 150% commercial dosage, 5000 g/ha) of atrazine. It was possible to observe that atrazine proved to be efficient in all evaluations, highlighting the dosage of 50% of the commercial recommendation for having better efficiency and lower phytotoxicity in B. ruziziensis.