Selectivity of post-emergence herbicides and foliar fertilizer in soybean crop

Authors

DOI:

https://doi.org/10.5965/223811712142022384

Keywords:

phytotoxicity, tank mix, foliar fertilization, fertilizers, herbicides, soybeans

Abstract

Herbicides and foliar fertilizers are commonly associated in soybean crops. However, these mixtures can cause different effects on the plants, therefore requiring further studies. Herein, we assess the selectivity of post-emergence herbicides associated with foliar fertilizer (FF) in soybean crops (Roundup Ready). The experiment was carried out in a randomized block design with four replications. The treatments applied were: chlorimuron (17.5 g a.i. ha-1), chlorimuron + FF (17.5 + 693 g a.i. ha-1), cloransulam (40 g a.i. ha-1), cloransulam + FF (40 + 693 g a.i. ha-1), fomesafen (225 g a.i. ha-1), fomesafen + FF (225 + 693 g a.i. ha-1), glyphosate (1,280 g a.i. ha-1), glyphosate + FF (1,280 + 693 g a.i. ha-1), and two controls, being one with manual weeding and the other without weed control. Visual assessments of phytotoxicity and chlorophyll index were carried out weekly from seven to thirty-five days after applying the treatments (DAA). In these periods, chlorophyll levels were also assessed. In addition, the yield, 1000-grain weight, and moisture data were assessed at the end of the crop cycle. Phytotoxicity was higher than 30% when cloransulam and chlorimuron were applied, while phytotoxicity was close to 5% for fomesafen and glyphosate, either in the absence or presence of foliar fertilizer. There was no significant difference in grain yield, 1000-grain weight, and moisture. The association of herbicides with zinc-based foliar fertilizer did not influence the selectivity of post-emergence herbicides applied to the RR soybean.

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Published

2022-12-12

How to Cite

ALENCAR, Erica da Silva de et al. Selectivity of post-emergence herbicides and foliar fertilizer in soybean crop. Revista de Ciências Agroveterinárias, Lages, v. 21, n. 4, p. 384–394, 2022. DOI: 10.5965/223811712142022384. Disponível em: https://revistas.udesc.br/index.php/agroveterinaria/article/view/21442. Acesso em: 17 jul. 2024.

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Section

Research Article - Science of Plants and Derived Products

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