Efficacy and phytotoxicity of post emergence herbicides in garlic

Dionatan SULIANI; Wendel Paulo SILVESTRE; Taísa DAL MAGRO

doi:10.14720/aas.2025.121.2.16247

Authors

Dionatan SULIANI University of Caxias do Sul, Course of Agronomy; Caxias do Sul, Brazil. dsuliani@ucs.br (ORCID: 0009-0004-6844-1299). https://orcid.org/0009-0008-4935-6186
Wendel Paulo SILVESTRE University of Caxias do Sul, Course of Agronomy and Postgraduate Program in Process Engineering and Technologies; Caxias do Sul, Brazil. wpsilvestre@ucs.br (ORCID: 0000-0002-9376-6405). https://orcid.org/0000-0002-9376-6405
Taísa DAL MAGRO Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (EPAGRI); Ituporanga, Brazil. taisamagro@epagri.sc.gov.br (ORCID: 0000-0001-9028-5174).

DOI:

https://doi.org/10.14720/aas.2025.121.2.16247

Keywords:

Phytotoxicity, efficacy, weed control, post-emergence

Abstract

The incidence of weeds in the garlic crop interferes with the quality and quantity of the harvest. This study aimed to evaluate the efficiency of herbicides in different combinations of sequential applications during the cultivation of garlic. The experiment was carried out in a randomized block design, with ten treatments and four replications. The treatments consisted of sequential applications of the herbicides pendimethalin, pyroxasulfone/flumioxazin, ioxynil, and pendimethalin. The doses of Herbadox® (pendimethalin) were 4.0 l∙ha-1, Totril® (ioxynil) 1.5 l∙ha-1, and Kyojin® (pyroxasulfone/flumioxazin) 0.15 l∙ha-1. Treatments consisted of sequential applications of herbicide combinations. Applications were performed 7, 58, 97, and 128 days after planting. Phytotoxicity on the crop, efficacy in weed control, bulb classification, and productivity were evaluated. The results were submitted to ANOVA, and the means were compared by the Scott-Knott test. The sequential application of pyroxasulfone/flumioxazin at 7 days after planting (DAP), ioxynil at 58 DAP, pendimethalin at 97 DAP, and pyroxasulfone/flumioxazin at 128 DAP (T7) stood out (96–100 % control of weeds, average productivity of 11.42 t·ha-1), which presented the best results relative to phytotoxicity, weed control, bulb classification, and crop productivity.

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