Pre-Sowing Control of Commelina benghalensis by Herbicides in Soybean Crops
DOI:
https://doi.org/10.17921/1415-6938.2025v29n4p1074-1090Abstract
Dayflower (Commelina benghalensis) is one of the main weeds that affect soybean production and stands out due to its frequency of occurrence in agricultural areas and the tolerance to the herbicide glyphosate. Therefore, the application of herbicide before sowing soybeans becomes essential in controlling dayflower due to the greater variety of herbicides that can be used. Thus, the objective of this study was to assess the efficiency of herbicides combined with glyphosate in the pre-sowing control of C. benghalensis and the treatments effects on soybean yield components. A randomized block experimental design was used, with seven herbicide treatments and three replications. Carfentrazone-ethyl had the highest efficacy in post-emergence control of C. benghalensis, but the plants regrew throughout the crop cycle. Halauxifen-methyl + diclosulam proved to be a good option to control C. benghalensis, with or without sequential application. The sequential application of glufosinate-ammonium was the most effective herbicide in controlling C. benghalensis. Soybean crop yield components presented no significant differences resulting from pre-sowing herbicide applications.
Keywords: Glycine max L. Merril. Weed. Grain Yield. Benghal Dayflower.
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Copyright (c) 2025 Matheus Martins Nogueira, Adriano Jakelaitis, Gustavo Castoldi, Alice Maria Albert, Estevão Rodrigues, Pedro Eduardo Rampazzo
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