Biostimulants derived from Ascophyllum nodosum associated of glyphosate in agronomic characteristics of soybean RR

Abstract

Glyphosate is the main herbicide in weed control in soybean. However, phytotoxicity symptoms after application of this herbicide are reported in RR soybean. In this context, biostimulants can potentiate the metabolic activities of the plant in function of the bioregulators, amino acids and nutrients present in its formulation, becoming an alternative to minimize the phytotoxic effects of glyphosate. Thus, the objective of this work was to identify the use of biostimulants, derived from Ascophyllum nodosum, associated to the herbicide glyphosate in the increments of the agronomic characteristics of the soybean crop. For this, an experiment was conducted in the 2014/15 harvest in Montividiu-GO with thirteen treatments, resulting from the combination of biostimulants MC Extra, MC Cream and Megafol with the herbicide glyphosate (Roundup Transorb). The results allowed us to conclude that the five-year combined application of the herbicide with MC Extra and Megafol provided greater increases in grain yield of soybean. MC Cream provided higher grain yield at 15 days after application of glyphosate. Thus, the biostimulants proved the potential of use in the soybean crop.