Performance de produtos à base de glyphosate aplicados isolados e em associações à herbicidas na dessecação

Bruno César Silva Pereira; Guilherme Braga Pereira Braz; Matheus de Freitas Souza; Lais Tereza Rêgo Torquato Reginaldo; Camila Jorge Bernabé Ferreira

doi:10.1590/1983-21252023v36n404rc

Authors

Bruno César Silva Pereira Crop Production Graduate Program, Universidade de Rio Verde, Rio Verde, GO https://orcid.org/0000-0002-4708-143X
Guilherme Braga Pereira Braz Crop Production Graduate Program, Universidade de Rio Verde, Rio Verde, GO https://orcid.org/0000-0002-0396-7140
Matheus de Freitas Souza Crop Production Graduate Program, Universidade de Rio Verde, Rio Verde, GO https://orcid.org/0000-0002-5424-6028
Lais Tereza Rêgo Torquato Reginaldo Crop Production Graduate Program, Universidade Federal Rural do Semi-Árido, Mossoró, RN https://orcid.org/0000-0001-6726-6733
Camila Jorge Bernabé Ferreira Crop Production Graduate Program, Universidade de Rio Verde, Rio Verde, GO https://orcid.org/0000-0001-5006-9661

DOI:

https://doi.org/10.1590/1983-21252023v36n404rc

Keywords:

No-tillage. Conservation system. Weed control. Glyphosate potassium salt. Glyphosate isopropylamine salt.

Abstract

The no-tillage system is a conservation system that helps sustainability and agricultural production. The effectiveness of glyphosate control, applied alone or in combination with other herbicides, can be altered depending on the product’s formulation. The objective of the present study was to evaluate the effectiveness of glyphosate in formulations containing different salts and concentrations, applied alone and in combination with other herbicides, in controlling weeds in advanced stages in the pre-sowing burndown operation. The experiment was carried out in the field in an area with a history of high weed infestation. The experiment was conducted in a randomized block design, evaluating eleven treatments and four replicates. The treatments consisted of the application of three glyphosate-based formulations alone and in combination with clethodim and 2,4-D amine herbicides, in addition to a control without herbicide application. The evaluated variables were percentage of weed control and percentage of desiccation. A comparison of means by contrasts was performed to analyze the percentage of weed control. In general, treatments containing products based on glyphosate potassium salt in the composition have slightly better control performance compared to those consisting of glyphosate isopropylamine salt.

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