The effectiveness of herbicidal desiccants and application times  on seed yield and earliness of soybean

Ergin, Nurgül; Kaya, Muammer

doi:10.15835/nbha48311826

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…However, the results may vary according to the production environment, the cultivar, and the predominant climatic conditions. The application of glufosinate (Delgado et al, 2015;Botelho et al, 2019;Zuffo et al, 2020) or diquat (Finoto et al, 2017;Ergin and Kaya, 2020) can affect soybean seed quality, especially at stages before R7. Thus, it is recommended, as a precautionary principle (in view of the potential variations), to apply pre-harvest desiccants, such as glufosinate, paraquat, carfentrazone, and diquat, in seed production fields exclusively at R7.3, as shown by Pereira et al (2015b).…”

Section: Discussionmentioning

confidence: 99%

Glufosinate and diquat in pre-harvest desiccation of soybean at four phenological stages, and their impact on seed quality

Albrecht

Yokoyama

Albrecht

et al. 2022

Chil. j. agric. res.

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Glufosinate and diquat may have different levels of efficacy in the pre-harvest desiccation of soybean (Glycine max (L.) Merr.) plants, and may affect quality of seeds differently, depending on the phenological stage at which they are applied. The objective of this study was to evaluate desiccation with glufosinate and diquat at the phenological stages R6, R7.1, R7.2, and R7.3, and to examine their effects on yield and quality of soybean seeds. The experiment was conducted at two sites in the state of Paraná (PR), Brazil, in the 2020-2021 crop season. A randomized block design was used, treatment groups consisted of application of glufosinate or diquat at R6, R7.1, R7.2, and R7.3, and the control group (without desiccant application). Defoliation, maturity, moisture, yield, and seed quality (vigor and germination) were evaluated. Glufosinate and diquat were effective at desiccation and had a significant effect on defoliation and maturity, with final values ≥ 98.8% and ≥ 99.3% respectively. Treatments can accelerate harvest maturity by approximately 3 d and earlier applications do not necessarily favor this acceleration, most notably in trial 1. However, desiccation at earlier stages reduced seed yield and negatively affected seed quality, with values of only 61.3% and 71.8% of vigor and germination in some situations. The application of glufosinate or diquat was effective in the pre-harvest desiccation of soybean plants, with no differences between the assessed herbicides or phenological stages. The application of glufosinate starting at R7.2 or diquat at R7.3 is ideal to avoid deleterious effects on seed yield. Applications at earlier stages may lead to losses of more than 30% seed yield. The use of diquat or glufosinate before R7.2 may reduce the quality of seeds.

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Section: Discussionmentioning

confidence: 99%

Glufosinate and diquat in pre-harvest desiccation of soybean at four phenological stages, and their impact on seed quality

Albrecht

Yokoyama

Albrecht

et al. 2022

Chil. j. agric. res.

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Carfentrazone-ethyla new desiccant for application in soybean

Radivojević¹,

Gajić-Umiljendić²,

Sarić-Krsmanović³

et al. 2021

Acta herbologica

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Efficacy of carfentrazone-ethyl for soybean desiccation was tested during the vegetation seasons of 2020 and 2021. The field trials were set up in Novi Karlovci and Putinci field sites, following a randomized block design, in four replicates. Carfentrazone-ethyl was applied as a commercial product Affinity Plus, in the dose of 1 L ha-1, while diquat and glufosinateammonium were used as standards and commercial products in their recommended application doses. All treatments were conducted in the stage of natural crop ripening, when 30% of the leaves had fallen. Efficacy evaluation was done 3 and 7 days after application (DAA), when the following parameters were observed: stem color, leaf color, pod color, stem mass (g), and pod mass (g). Carfentrazone-ethyl, as Affinity Plus, in quantities of 1 L/ha led to the desiccation of soybean stems, leaves and pods. Carfentrazone-ethyl, depending on the study year and field site, has resulted in a 31-55% stem mass reduction 3 DAA and 43-56% 7 DAA. Pods mass was reduced by 22-36% 3DAA and 27-39% 7DAA. Under the same conditions, diquat and glufosinate-ammonium reduced the observed soybean parameters by 1-18% more, when compared with carfentrazone-ethyl. Therefore, the results of this study show that carfentrazone-ethyl can be used in soybean desiccation, but that soybean producers must be aware of its lower efficacy, when compared with diquat and glufosinate-ammonium.

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The effectiveness of herbicidal desiccants and application times on seed yield and earliness of soybean

Cited by 2 publications

References 12 publications

Glufosinate and diquat in pre-harvest desiccation of soybean at four phenological stages, and their impact on seed quality

Glufosinate and diquat in pre-harvest desiccation of soybean at four phenological stages, and their impact on seed quality

Carfentrazone-ethyla new desiccant for application in soybean

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