Pre-emergents in soybeans require combined use in the Cerrado

The initial management of soybean crops increasingly depends on the efficient use of pre-emergent herbicides, according to agronomist Ranuelli Renon Flor. In areas with high infestation or a history of resistance, the correct use of these molecules ensures a cleaner start to the crop season with less competition for resources. The combination of different chemical groups is essential to broaden the spectrum of control and avoid failures in management. Among the products most used in the Cerrado, three active ingredients stand out with complementary functions. S-metolachlor, from group 15, has proven highly effective in controlling annual grasses such as rice grass, crabgrass, and brachiaria. Trials indicate performance between 85% and 95% when applied under good moisture conditions. Its effect on broadleaves is limited, and it is common to associate it with other molecules to reinforce control. Diclosulam, belonging to group 2, offers excellent performance on broadleaves such as ...