Overexpression of cytochrome P450 CYP71AF43 contributing resistance to fenoxaprop-P-ethyl in Alopecurus myosuroides from China.

Black-grass (Alopecurus myosuroides), one of the most economically destructive herbicide-resistant weeds in Europe, is rapidly expanding in winter wheat regions of China. In recent years, the recommended application rate of fenoxaprop-P-ethyl in the field has failed to effectively control Alopecurus myosuroides populations, thereby threatening wheat yields at risk. In this study, we collected a suspected herbicide-resistant population (R-HB) of Alopecurus myosuroides from a wheat field in Hebei Province and confirmed its resistance to fenoxaprop-P-ethyl, with a resistance index of 26.

First case of glyphosate resistance in Polypogon fugax: possible involvement of P450-based mechanisms.

Background: Polypogon fugax has evolved resistance to multiple herbicides in China, yet there has been no documented case of glyphosate resistance. A putative glyphosate-resistant P. fugax (HN-R) population was collected from canola fields in Hunan Province, China, surviving glyphosate treatment at the field-recommended rate [540 g acid equivalent (a.

PfGSTF2 endows resistance to quizalofop-p-ethyl in Polypogon fugax by GSH conjugation.

Populations of Polypogon fugax have developed resistance to many acetyl-CoA carboxylase (ACCase)-inhibiting herbicides. This resistance threats the effectiveness and sustainability of herbicide use. In our previous research, a field P.

Cytochrome P450 and Glutathione S-Transferase Are Linked to High-Level Resistance to Glufosinate.

has become a global nuisance weed and has evolved resistance to glufosinate. The involvement of target-site resistance (TSR) in glufosinate resistance in has been elucidated, while the role of nontarget-site resistance (NTSR) remains unclear. Here, we identified a glufosinate-resistant (R) population that is highly resistant to glufosinate, with a resistance index of 13.

Detoxification mechanism of herbicide in Polypogon fugax and its influence on rhizosphere enzyme activities.

The excessive use of chemical herbicides has resulted in evolution of herbicide-resistant weeds. Cytochrome P450 monooxygenases (P450s) are vital detoxification enzymes for herbicide-resistant weeds. Herein, we confirmed a resistant (R) Polypogon fugax population showing resistance to quizalofop-p-ethyl, acetolactate synthase (ALS)-inhibiting herbicide pyroxsulam, and several other ACCase (acetyl-CoA carboxylase)-inhibiting herbicides.