DESEMPENHO DA SOJA SUBMETIDA A APLICAÇÃO DE FORMULAÇÕES DE GLYPHOSATE EM ASSOCIAÇÃO COM BIOESTIMULANTE

Christiano Lima Lobo de Andrade; Alessandro Guerra da Silva; Guilherme Braga Pereira Braz; Rubem Silvério de Oliveira Junior; Gustavo André Simon

doi:10.1590/1983-21252020v33n210rc

Authors

Christiano Lima Lobo de Andrade Department of Agricultural Sciences, Instituto Federal Goiano, Rio Verde, GO https://orcid.org/0000-0002-6743-3666
Alessandro Guerra da Silva Department of Agricultural Sciences, Universidade de Rio Verde, Rio Verde, GO https://orcid.org/0000-0002-9556-0312
Guilherme Braga Pereira Braz Department of Agricultural Sciences, Universidade de Rio Verde, Rio Verde, GO https://orcid.org/0000-0002-0396-7140
Rubem Silvério de Oliveira Junior Department of Agricultural Sciences, Universidade Estadual de Maringá, Maringá, PR https://orcid.org/0000-0002-5222-8010
Gustavo André Simon Department of Agricultural Sciences, Universidade de Rio Verde, Rio Verde, GO https://orcid.org/0000-0001-6935-6580

DOI:

https://doi.org/10.1590/1983-21252020v33n210rc

Keywords:

Algae extract. Ascophyllum nodosum. Glycine max. Herbicides. Productivity.

Abstract

Glyphosate is the main herbicide used in the Roundup Ready^® (RR^®) soybean crop. However, the different salt and herbicide formulations available on the market can lead to crop intoxication. In this scenario, biostimulants appear as a promising alternative to mitigate the possible phytotoxic effects of glyphosate. Thus, the objective of this work was to evaluate the effects of different MC Extra^® biostimulant doses associated with glyphosate formulations on the agronomic characteristics of a herbicide-tolerant soybean cultivar. Two experiments were conducted in the 2015/16 and 2016/17 seasons with three doses of MC Extra^® (0.35, 0.70, and 1.00 kg ha^-1) associated with six formulations of glyphosate: Glyphotal^®, Roundup Original^®, Roundup Ready^®, Roundup WG^®, Roundup Transorb^®, and Zapp QI^®, plus additional treatment without the use of the herbicide. In both experiments, we used 900 g e.a. ha^-1 of glyphosate. The results showed that the highest dose of MC Extra^®, in combination with the Roundup Original^®, Roundup Ready^®, and Roundup Transorb^® formulations and 0,70 kg ha^-1 of MC Extra^® with Glyphotal^® provided the highest grain yields. When used in conjunction with the herbicide, there is a need to increase the dose of MC Extra^®to obtain higher soybean yields.

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