Broad spectrum effectiveness of pyroxasulfone + flumioxazin for weed control in pre-emergence of soybean
DOI:
https://doi.org/10.18406/2316-1817v17nunico20251962Palavras-chave:
Herbicides. Inhibitors of biosynthesis of VLCFA. PPO inhibitors. Digitaria insularis. Amaranthus hybridusResumo
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. This study was developed in order 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. (morning glory), 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 herbicide 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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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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