HERBICIDAS PARA DESSECAÇÃO DE SOJA: EFICIÊNCIA E QUALIDADE DAS SEMENTES

Abstract

Soy is one of the main agricultural products in Brazil. Pre-harvest desiccation is a very important step within the Cerrado soy / corn succession system, desiccation should be performed at the point of physiological maturity to avoid compromising seed vigor. Therefore, the objective was to evaluate the desiccation efficiency of 4 herbicides and the seed quality. The experiment was conducted at the Federal Institute of Goiás, located in Urutaí / GO, in DBC (randomized block design) with 21 treatments (5 doses of each herbicide) and 1 control. Desiccation was performed at stage R7, in the days after desiccation there were constant rainfall. There were two evaluations using visual scale of phytointoxication at 4 and 6 DAA and a linear regression test was performed for each evaluation, the collection was performed 7 DAA (days after application). At the time of harvest, the plots were high in moisture. In the laboratory, the humidity was determined using the greenhouse method at 105o C and the emergency test was conducted in DBC in an area close to the IF Goiano seed laboratory with 13 treatments and 1 control discarding the treatments with high contamination. A comparative test was performed between normal seedling average and humidity. Ammonium glufosinate herbicide is an alternative and desiccation in soybean crop.