Broad spectrum effectiveness of pyroxasulfone + flumioxazin for weed control in pre-emergence of soybean

Authors

  • Leandro Paiola Albrecht Universidade Federal do Paraná – UFPR
  • Alfredo Junior Paiola Albrecht Universidade Federal do Paraná – UFPR
  • André Felipe Moreira Silva Crop Science Pesquisa e Consultoria Agronômica – Crop Pesquisa, pesquisador
  • Fernando Luiz Buss Tupich Iharabras – IHARA
  • Diosef Huston Alves Ferrari Iharabras – IHARA
  • Willian Felipe Larini Universidade Federal do Paraná – UFPR
  • Luís Henrique Glaeser Benincá Universidade Federal do Paraná – UFPR
  • Vanessa Hort de Oliveira Universidade Federal do Paraná – UFPR

DOI:

https://doi.org/10.18406/2316-1817v17nunico20251962

Keywords:

Herbicides, Inhibitors of biosynthesis of very-long-chain fatty acids (VLCFA), Protoporphyrinogen oxidase (PPO) inhibitors, Digitaria insularis, Amaranthus hybridus

Abstract

It is necessary to search for solutions to control weeds, focusing on pre-emergent herbicides. Pyroxasulfone + flumioxazin is believed to be effective in controlling weeds in soybean, as well as other pre-emergent herbicides used in this crop. The aim of this study was to evaluate the effectiveness of the pre-formulated mixture pyroxasulfone + flumioxazin, for application in pre-emergence of soybean. Experiment was conducted in two trials in the 2020-2021 growing season. The treatments consisted of non-treated control, pyroxasulfone + flumioxazin (90 + 60 g ai ha-1), imazethapyr + flumioxazin (100 g ae ha-1 + 50 g ai ha-1), diclosulam (29.4 g ai ha-1), sulfentrazone + diuron (175 + 350 g ai ha-1) and s-metolachlor (1,440 g ai ha-1). Trial 1 was infested with Digitaria insularis (sourgrass), Ipomoea spp., Urochloa plantaginea (alexandergrass), and Amaranthus hybridus (smooth pigweed). Trial 2 was infested with sourgrass, morning glory, other grasses, and other broadleaves. Weed control, soybean injury and yield were evaluated. Pyroxasulfone + flumioxazin stood out, which was the only one among the best in all evaluations, demonstrating its broad spectrum of action. Also highlighted are the other formulated premixes, imazethapyr + flumioxazin and sulfentrazone + diuron. Diclosulam was almost always among the most effective in controlling broadleaves, but with the worst performance in controlling grasses, the opposite was observed for s-metolachlor. Herbicides are effective in controlling weeds, with emphasis on pyroxasulfone + flumioxazin, imazethapyr + flumioxazin and sulfentrazone + diuron, effective in controlling sourgrass, smooth pigweed, morning glory, alexandergrass, among others.

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Published

2025-08-12

How to Cite

Albrecht, L. P., Albrecht, A. J. P., Silva, A. F. M., Tupich, F. L. B., Ferrari, D. H. A., Larini, W. F., … Oliveira, V. H. de. (2025). Broad spectrum effectiveness of pyroxasulfone + flumioxazin for weed control in pre-emergence of soybean. Revista Agrogeoambiental, 17(unico), e20251962. https://doi.org/10.18406/2316-1817v17nunico20251962

Issue

v. 17 (2025) - Publicação contínua em volume anual

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AGRONOMY

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Copyright (c) 2025 Leandro Paiola Albrecht, Alfredo Junior Paiola Albrecht, André Felipe Moreira Silva, Fernando Luiz Buss Tupich, Diosef Huston Alves Ferrari, Willian Felipe Larini, Luís Henrique Glaeser Benincá, Vanessa Hort de Oliveira

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