Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.2
3.7
Journals
Agronomy
Special Issues
25 Years of Glyphosate-Tolerant Crops: What We Have Learned and...
share announcement

25 Years of Glyphosate-Tolerant Crops: What We Have Learned and How to Face the New Challenges

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Weed Science and Weed Management".

Deadline for manuscript submissions: closed (20 March 2023) | Viewed by 5710

Special Issue Editors

Dr. Élise Smedbol

E-Mail Website
Guest Editor
Department of Plant Science, Macdonald Campus of McGill University, 21111 Lakeshore Road, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada
Interests: herbicides; plant physiology; agroenvironment; weed management; water quality; environmental risk assessment
Dr. Guilherme Braga Pereira Braz

E-Mail Website
Guest Editor
Agronomy Department, Universidade de Rio Verde, Fontes do Saber Research Farm, s/n, 75901-970 Rio Verde (Goiás State), Brazil
Interests: impact of the weed community on major crops (soybeans, corn, grain sorghum, and cotton); integrated weed management with the adoption of cover crops; practices for optimization of chemical weed control; selectivity of herbicides to different crops
Dr. Eloisa Dutra Caldas

E-Mail Website1 Website2
Guest Editor
Department of Pharmacy, University of Brasilia, Brasília DF 70910-900, Brazil
Interests: toxicology; pesticides; water analysis; food analysis; LC-MS/MS; GC-MS/MS; dietary risk assessment; environmental risk assessment

Special Issue Information

Dear Colleagues,

The coupling of glyphosate-tolerant crops with glyphosate-based herbicides is the main weed management strategy in corn, soybean, cotton, and canola, in several countries worldwide (e.g., United States, Brazil, Argentina, Canada, India). The development of herbicide-tolerant crops was an outstanding scientific breakthrough, aiming initially at facilitating weed control and reducing herbicide use. Indeed, glyphosate is a non-selective, systemic, and non-residual herbicide. It can be used before sowing (burndown applications), during the growing season on tolerant crops or before harvest as a desiccant for non-tolerant crops. Initially, applying glyphosate-based herbicides replaced the need to apply other active ingredients in tolerant crops, with the other available active ingredients most often being more harmful than glyphosate (e.g., atrazine). 

However, twenty-five years after their introduction on the market new challenges have arisen, such as the development of glyphosate-resistant weeds, the occurrence of volunteer crop plants in glyphosate-tolerant planted crops, and an extraordinary increase in the sales volume for glyphosate-based herbicides with an increased detection of glyphosate and its by-product aminomethylphosphonic acid (AMPA) in waterways. A current strategy to cope with weed resistance is the development of crops with stacked genes for multiple herbicide tolerance. Unfortunately, this strategy requires the spraying of multiple active ingredients on field. Most of these are more toxic than glyphosate, which increases the environmental and human health risks. Therefore, it seems that the adoption of glyphosate-tolerant crops coupled with glyphosate-based applications does not offer a complete answer regarding weed management and sustainability. 

This Special Issue aims to foster a conversation about the agronomic and environmental challenges related to the adoption of glyphosate-tolerant crops and glyphosate-based herbicide applications, and about solutions proposed to help cope with some of these new challenges. Research areas may include (but are not limited to) the following:

  • Glyphosate-resistant weeds;
  • Mechanisms of resistance to glyphosate;
  • Control of volunteer crop plants;
  • Integrated weed management in glyphosate-tolerant crops;
  • Environmental risk assessment;
  • Herbicides and plant physiology;
  • Analytical development for pesticide residue analysis. 

We are pleased to invite you to contribute to this Special Issue, where original research articles, reviews, opinion pieces and mini-reviews are welcome.

We look forward to receiving your contributions.

Dr. Élise Smedbol
Dr. Guilherme Braga Pereira Braz
Dr. Eloisa Dutra Caldas
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • glyphosate resistant weeds
  • volunteer crop plants
  • integrated weed management
  • EPSP synthase enzyme
  • herbicide residues
  • herbicide environmental fate
  • plant physiology

Published Papers (3 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

14 pages, 2343 KiB  
Article
Lack of Significant Effects of Glyphosate on Glyphosate-Resistant Maize in Different Field Locations
by Vitor Simionato Bidóia, José Cristimiano dos Santos Neto, Cleber Daniel de Goes Maciel, Leandro Tropaldi, Caio Antonio Carbonari, Stephen Oscar Duke and Leonardo Bianco de Carvalho
Agronomy 2023, 13(4), 1071; https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy13041071 - 06 Apr 2023
Cited by 1 | Viewed by 1689
Abstract
Glyphosate-resistant (GR) maize is dominant in countries where it is grown. Significant, adverse effects of glyphosate application to GR maize have been reported, but few data from robust studies exist to determine if such effects are common. In this study, the effects of [...] Read more.
Glyphosate-resistant (GR) maize is dominant in countries where it is grown. Significant, adverse effects of glyphosate application to GR maize have been reported, but few data from robust studies exist to determine if such effects are common. In this study, the effects of recommended application rates (single and sequential applications) were used on GR maize grown at two locations for one season and for two seasons in a third location. No significant effects of glyphosate on mineral content (N, P, K, Ca, Mg, S, Cu, Fe, Mn, and Zn) in leaves or grain, plant height, stem diameter, ear parameters, or yield were found at any location or in any growing season. Likewise, harvested grain quality, as determined by percent starch, protein, and total lipids, was unaffected by glyphosate treatment at any location. Neither glyphosate nor aminomethylphosphonic acid, the primary degradation product of glyphosate, were found in grain from any treatment at any location, except for 20 ng g−1 of glyphosate found in grain from one season at one location. These results support the view that recommended applications of glyphosate have no significant effects on growth, grain composition, mineral content, grain quality, nor yield of GR maize. Full article
(This article belongs to the Special Issue 25 Years of Glyphosate-Tolerant Crops: What We Have Learned and How to Face the New Challenges)
►▼ Show Figures

Figure 1

13 pages, 1470 KiB  
Article
Agronomic Performance of RR® Soybean Submitted to Glyphosate Application Associated with a Product Based on Bacillus subtilis
by Guilherme Braga Pereira Braz, Eduardo Souza Freire, Bruno César Silva Pereira, Fernanda dos Santos Farnese, Matheus de Freitas Souza, Lucas Loram-Lourenço and Letícia Ferreira de Sousa
Agronomy 2022, 12(12), 2940; https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy12122940 - 24 Nov 2022
Cited by 1 | Viewed by 1446
Abstract
Despite the great benefits arising from the adoption of Roundup Ready® (RR®) soybean, there are reports about the lack of selectivity of glyphosate for this crop. The use of growth-promoting microorganisms can help attenuate the injuries caused by herbicides. The [...] Read more.
Despite the great benefits arising from the adoption of Roundup Ready® (RR®) soybean, there are reports about the lack of selectivity of glyphosate for this crop. The use of growth-promoting microorganisms can help attenuate the injuries caused by herbicides. The objective of this work was to evaluate the agronomic performance of RR® soybean submitted to the post-emergence application of glyphosate both isolated and in association with Bacillus subtilis. The experiment was carried out in a completely randomized block design, with four replications. The treatments consisted of the post-emergence applications of glyphosate (1296 g a.i. ha−1), glyphosate (2592 g a.i. ha−1), glyphosate/glyphosate (1296/1296 g a.i. ha−1), glyphosate + B. subtilis BV02 (1296 + 42 g a.i. ha−1), glyphosate + B. subtilis BV02 (2592 + 42 g a.i. ha−1), and glyphosate + B. subtilis BV02/glyphosate + B. subtilis BV02 (1296 + 42/1296 + 42 g a.i. ha−1). The application of glyphosate (2592 g a.i. ha−1) and the sequential application of glyphosate provides higher levels of intoxication. The association of B. subtilis BV02 with glyphosate (2592 g a.i. ha−1) prevented losses in the values of relative chlorophyll a and b and the total chlorophyll index. The soybean yield was reduced when the plants were submitted to a sequential application of glyphosate. Full article
(This article belongs to the Special Issue 25 Years of Glyphosate-Tolerant Crops: What We Have Learned and How to Face the New Challenges)
►▼ Show Figures

Figure 1

15 pages, 1746 KiB  
Article
Impact of Soil Characteristics and Weed Management Practices on Glyphosate and AMPA Persistence in Field Crops Soils from the St. Lawrence Lowlands (Quebec, Canada)
by Sophie Maccario, Marc Lucotte, Matthieu Moingt, Émile Samson-Brais, Élise Smedbol and Michel Labrecque
Agronomy 2022, 12(5), 992; https://doi.org/10.3390/agronomy12050992 - 21 Apr 2022
Cited by 4 | Viewed by 1852
Abstract
The use of glyphosate-based herbicides (GBHs) in industrial agriculture has intensified in the past decades, causing a growing concern about the occurrence and spatial distribution of glyphosate and its principal metabolite, aminomethylphosphonic acid (AMPA), in the environment. In 2014, glyphosate and AMPA content [...] Read more.
The use of glyphosate-based herbicides (GBHs) in industrial agriculture has intensified in the past decades, causing a growing concern about the occurrence and spatial distribution of glyphosate and its principal metabolite, aminomethylphosphonic acid (AMPA), in the environment. In 2014, glyphosate and AMPA content was measured in 45 soils from the St. Lawrence Lowlands (Quebec, Canada) before seeding and at harvest in soybean field crops using various weed management practices with or without GBH applications. At the same time, a recent history of agricultural practices and soil conditions was compiled for the sampled sites. The results of the study show that 91% of the samples contained detectable amount of either glyphosate or AMPA, with maximum values of 0.47 mg·kg−1 and 1.16 mg·kg−1 for glyphosate and AMPA, respectively. Surprisingly, detectable amounts of AMPA were measured in fields not treated with GBHs in 2014, whereas traces of both glyphosate and AMPA were detected in organic field crops, highlighting the potential spreading and/or persistence of both compounds in the environment. Glyphosate content was significantly higher in clay soils rich in exchangeable cations, such as Mg2+, K+ and Ca2+, which can contribute to the retention of glyphosate in soil via complexation processes. Full article
(This article belongs to the Special Issue 25 Years of Glyphosate-Tolerant Crops: What We Have Learned and How to Face the New Challenges)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-3
Back to TopTop