Glyphosate-Resistant Weeds Control with Double-Shooting in Soybean Pre-Planting
DOI:
https://doi.org/10.17921/1415-6938.2025v29n3p655-669Abstract
The weed resistence and tolerance to herbicides is an important soybean yield gap. The use of double-shooting, herbicide combinations, and action mechanisms rotation can be effective for an early control of these species. The aim of this study was to analyze the double-shooting performance of flumioxazin and glufosinate on the glyphosate-tolerant and glyphosate-resistant weeds. The experiment was conducted on Brazilian Yellow Argisoil distrocoesic, in a commercial soybean crop located in Mata Roma, Maranhão, Brazil, with a history of successive glyphosate use over a decade. The study was designed in randomized blocks, with six treatments, two additional controls, and five replicates. The treatments consisted of control 1 (no herbicide), control 2 (isolated glyphosate application - 1,500 g a.e. ha-¹), and sequential spraying of glufosinate (500 and 600 g a.e. ha-¹), flumioxazin (50 and 75 g a.i. ha-¹), and glufosinate + flumioxazin (500/600 + 50/75 g a.i. ha-¹). We evaluated weed control percentage, as well as the phytotoxicity, density, and soybean yield. At the end of this study, double-shooting control is recommended, which should be carried out with a first application of glyphosate (1,500 g a.i. ha⁻¹), followed by glufosinate (500 or 600 g a.i. ha⁻¹) + flumioxazin (50 or 75 g a.i. ha⁻¹). The implementation of this management untilthe 16 days early soybean planting reduces yield losses and increases glyphosate-resistant and glyphosate-tolerant weeds controls.
Keywords: Glycine max (L.) Merrill. Flumioxazin. Glufosinate. Early Management. Tolerant Weed.
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Copyright (c) 2025 Lourrana Rhavenna Diogo Silva, Edmilson Igor Bernardo Almeida, Fernanda Mendonça Freitas, Marlon Breno Soares De Araújo, Andreza Maciel De Sousa, Gerson Freitas Vieira Neto, Gustavo Schalm Strobel, Washington Da Silva Sousa
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