Weed Control J 2023; 22: e202300777

ISSUE Cover

Herbicides performance in pre-harvest desiccation of soybean cultivars

DOI: 10.7824/wcj.2023;22:00777

Abstract

Background

Pre-harvest desiccation has become common in systems grown with soybeans, mainly by the need to harvest anticipation for grains or seeds. However, there are few herbicides registered for this practice, and may present different results according to the culture region of the crop.

Objective

In view of this, the objective of this study was to evaluate the effects of the application of desiccant herbicides on the agronomic characteristics and the physiological quality of soybean seeds in two important soybean producing regions of Brazil.

Methods

The experiments were conducted in Rio Verde, Goiás and Maringá, Paraná. The treatments were constituted by the application of herbicides 2,4-D, atrazine, ammonium glufosinate and paraquat plus control treatment, applied to the physiological maturity of soybean cultivars BRS 7560®, M-Soy 6101®, NK 9070 RR®, BMX Potência RR®.

Results

The results allowed to notice that the herbicides did not influence the grain yield and yield components, besides being effective in anticipating the defoliation of the plants in both locations. Additionally, soybean cultivars had germination and seed vigor differently influenced by herbicides.

Conclusions

The herbicides atrazine, 2,4-D, paraquat and glufosinate did not influence grain yield and were effective in early plant defoliation in both experimental localities.