Sumatran fleabane (Conyza sumatrensis [Retz.] E. Walker) control in soybean with combinations of burndown and preemergence herbicides applied in the off-season

Sumatran fleabane (Conyza sumatrensis [Retz.] E. Walker) can be found in many different agricultural environments and impact crops, such as soybeans corn. It is believed that the application of burndown preemergence herbicides off-season are effective controlling soybean crops. The objective was to evaluate effectiveness off-season, with one or two applications, control cultivation. Five field experiments were conducted Maripá, state Paraná (PR), Brazil. treatments consisted combinations ones, applications. Control yield evaluated. With set experiments, it highlighted strategy combining more herbicides, preemergence, promising fleabane. When comparing synthetic auxins, dicamba triclopyr stand out. For sequential application, worse performance observed for diquat. Combinations between fleabane, pre sowing soybean. emphasis on managements applications saflufenacil glufosinate glyphosate.