Inhibition of EPSPS overexpression of glyphosate-resistant Lolium perenne L. with a clethodim and glyphosate mixture.

Background: Glyphosate-resistant populations of some grass species have demonstrated high sensitivity to combinations of glyphosate and acetyl-CoA carboxylase (ACCase)-inhibiting herbicides. Nevertheless, it is unclear how glyphosate contributes to the control of glyphosate-resistant plants when combined with other active ingredients such as clethodim. The current work aimed to detect if glyphosate-resistant Lolium perenne L.

Convergent Adaptation of Multiple Herbicide Resistance to Auxin Mimics and ALS- and EPSPS-Inhibitors in from North and South America.

Herbicide-resistant weeds have been identified and recorded on every continent where croplands are available. Despite the diversity of weed communities, it is of interest how selection has led to the same consequences in distant regions. is a widespread naturalized weed that is found throughout temperate North and South America, and it is a frequent weed among winter cereal crops in Argentina and in Mexico.

Constitutive overexpression of EPSPS by gene duplication is involved in glyphosate resistance in Salsola tragus.

Background: Glyphosate-resistant Salsola tragus accessions have been identified in the USA and Argentina; however, the mechanisms of glyphosate resistance have not been elucidated. The goal of this study was to determine the mechanism/s of glyphosate resistance involved in two S. tragus populations (R1 and R2) from Argentina.

A novel EPSPS Pro-106-His mutation confers the first case of glyphosate resistance in Digitaria sanguinalis.

Background: Digitaria sanguinalis has been identified as a species at high risk of evolving herbicide resistance, but thus far, there are no records of resistance to glyphosate. This weed is one of the most common weeds of summer crops in extensive cropping areas in Argentina. It shows an extended period of seedling emergence with several overlapping cohorts during spring and summer, and is commonly controlled with glyphosate.

Cytochrome P450 Herbicide Metabolism as the Main Mechanism of Cross-Resistance to ACCase- and ALS-Inhibitors in spp. Populations From Argentina: A Molecular Approach in Characterization and Detection.

Knowledge about the mechanisms of herbicide resistance provide valuable insights into evolving weed populations in response to selection pressure and should be used as a basis for designing management strategies for herbicide-resistant weeds. The selection pressure associated with reactive management against glyphosate-resistant spp. populations would have favored the herbicide resistance to ACCase- and ALS-inhibitors.