What is the mechanism of weeds resistance to herbicides?
Genetic variations in some weeds so one of the best solutions is producing a new herbiced (new mode of action
Hi, Dr Tous
This link see:
https://extension.umn.edu/herbicide-resistance-management/herbicide-resistant-weeds
The weed becomes resistant by the constant use of herbicides of the same chemical group, even by underdosing or making applications when the weed presents an advanced stage, in addition, resistance is likely due to the appearance of new biotypes.
Herbicide resistant weeds have always existed, even before a herbicidal molecule was released on the market. However, these plants naturally exist at low frequencies.
With the massive use of the same herbicide year after year, these already resistant plants are selected, survive and give rise to a new generation of plants that are also resistant. The consequence is the increase of the frequency of dispersion in an area, and later, region, state, country, etc. It is at this point that resistance is strongly.
As for the mechanisms of resistance, there are basically 2 types: 1 - Those belonging to the target site that involves mutations in the target enzyme and / or enzymatic overexpression. 2 - Those not belonging to the target site are related to lower absorption, translocation and metabolization of the herbicide in non-toxic compounds to the plants.
@ Amir-Hossein Danaye-Tous
Please also take a look at these useful RG links.
Chapter Mechanisms of herbicide resistance in weeds
Chapter Resistance of Weeds to Herbicides
Article Herbicide resistance in weeds it's Management
Article Recent advances in herbicide resistance in weeds and its management
Thanks!
Hello, Herbicide resistance is the inherited ability of a plant to survive and reproduce following exposure to a dose of herbicide normally lethal to the wild type. Herbicides do not induce resistance in weed species, rather they simply select for resistant individuals that naturally occur within the weed population.
It is similar to how bacteria get immune to antibiotics over a period of time. Due to mutation and evolution organisms that want to invade another organism tend to develop defense mechanisms to survive. In a similar way weeds adapt and evolve to the action of herbicides over a period of time.
- Badges
- Science topic
- Similar topics
- Agricultural Science
- Agronomy
- Crop Science
- Crop