Harvest Times With Chemical Desiccation and the Effects on the Enzymatic Expression and Physiological Quality of Soybean Seeds

Zuffo, Alan Mário; Aguilera, Jorge González; Carvalho, Everson Reis; Teodoro, Paulo Eduardo

doi:10.1590/1983-21252020v33n209rc

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…In addition to paraquat, other herbicides have been used for this purpose. Some studies have reported the efficacy of glufosinate (Delgado et al, 2015), diquat (Finoto et al, 2017;Araújo et al 2018), carfentrazone (Pereira et al, 2015), saflufenacil (Zuffo et al, 2020) and flumioxazin (Carvalho, 2017). Zagonel (2005) observed equivalent efficacies for the application of diquat (200 g a.i.…”

Section: Overview Of Paraquat Use In Brazil and Other Countriesmentioning

confidence: 99%

Agronomic implications of paraquat ban in Brazil

Albrecht¹,

Albrecht²,

Silva³

2022

Advances in Weed Science

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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided that the original author and source are credited. Paraquat: mode of action and historical aspectsParaquat and diquat are bipyridylium herbicides with photosystem I electron diversion mode of action. They have contact action, limited translocation and rapid Abstract: Background: Paraquat is a broad spectrum herbicide used particularly in burndown, in pre-plant of row crops and in the pre-harvest desiccation of some crops. In Brazil, paraquat was re-evaluated by Anvisa, leading to a prohibition of production and sales on September 22, 2020, and used until July 31, 2021. Objective: The objective of this review is to characterize the use of paraquat in Brazil and describe the status in other countries, particularly the agronomic implications of its ban, possible replacements, and scenarios. Review: The use of paraquat is important for weed management in different production systems. Owing to its toxicity, its use has been reevaluated in several countries. For pre-harvest desiccation of soybeans, diquat, glufosinate, and some combinations with Protox inhibitors are highlighted as alternatives to paraquat. For pre-harvest desiccation of common beans, diquat, saflufenacil, and glufosinate could be used; however, only glufosinate could be used for wheat. For managing broadleaves weeds, glufosinate, saflufenacil, carfentrazone, and diquat are effective alternatives. Diquat may be less effective in controlling Conyza spp. resistant to paraquat. For grasses control, glufosinate, in addition to ACCase inhibitors and possible mixtures, may be helpful. Although pre-emergent herbicides are not classified as desiccant herbicides, they contribute to weed management. The adoption of herbicide-tolerant crops, mechanical control, and cover crops can be added as agricultural practices for integrated weed management. Conclusions: Due to the ban on paraquat, challenges arise, and the most often suggested replacements are glufosinate, diquat, and Protox inhibitors; however, grass control will be of greater concern.

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Section: Overview Of Paraquat Use In Brazil and Other Countriesmentioning

confidence: 99%

Agronomic implications of paraquat ban in Brazil

Albrecht¹,

Albrecht²,

Silva³

2022

Advances in Weed Science

View full text Add to dashboard Cite

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Physiological Quality of Soybean Seeds as a Function of Soil Management Systems and Pre-Harvest Desiccation

et al. 2023

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Soil management systems directly interfere in the soil–plant relationship. However, there are still few studies evaluating the influence of long-term management systems on the physiological quality of soybean seeds. Another little-known topic is the influence of pre-harvest desiccation on the physiological quality of soybean seeds, especially on seed longevity. Thus, the aim of this research was to evaluate the physiological quality of soybean seeds cultivated under conventional tillage and no-tillage systems with and without desiccant use. The experiment was carried out in design is a split plot in a randomized complete block design. The treatments consisted of soil management systems (conventional tillage and no-tillage), with and without pre-harvest desiccation. In the treatment with desiccation, the herbicide Paraquat was applied, when the plants were at the R7.3 phenological stage (most of the seeds had a yellowish coat, with a shiny surface and were already detached from the pod). Seed germination, vigor (first germination count, seedling dry mass, seedling length, time to reach 50% germination (T50), seedling emergence and emergence speed index) and longevity (P50) were evaluated. Seeds cultivated under conventional tillage showed greater vigor for most traits evaluated, with values of T50 and seedling length higher by 24.39% and 24.77%, respectively, compared to NT. In addition, non-desiccation increased the seedling length and dry mass, in 15.45% and 21.59%, respectively. The use of desiccant aiming at seed vigor is dependent on the soil management system. Soybean seed longevity was superior in the no-tillage system, but desiccant application reduced seed longevity.

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Harvest Times With Chemical Desiccation and the Effects on the Enzymatic Expression and Physiological Quality of Soybean Seeds

Cited by 2 publications

References 18 publications

Agronomic implications of paraquat ban in Brazil

Agronomic implications of paraquat ban in Brazil

Physiological Quality of Soybean Seeds as a Function of Soil Management Systems and Pre-Harvest Desiccation

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