Reduced Translocation of Glyphosate and Dicamba in Combination Contributes to Poor Control of Kochia scoparia : Evidence of Herbicide Antagonism

by:BrightMart     2020-03-08
Kochia scoparia is a troublesome weed on the Great Plains of North America.
Glyphosate and wheat straw have been used to control K for decades. scoparia.
Thanks to a wide selection of glyphosate-and dicamba-resistant (GDR)K.
Scoparia developed in the United States.
The herbicide mixture is usually used to improve weed control.
If the interaction of the herbicide leads to the action of confrontation, it will significantly affect the management of weeds, such as K. scoparia.
Reveal the interaction between glyphosate and wheat straw in K. combination
Scoparia management uses GDR and known glyphosate-evaluated the efficacy of different doses of glyphosate and wheat straw in greenhouse and field conditionsand dicamba-susceptible (GDS)K. scoparia.
The results of greenhouse and field studies show that the combination of glyphosate and the application of wheat straw control the GDS, but only glyphosate control the gdr k better.
Scoparia is compared to the combination of glyphosate and wheat straw.
In addition, the investigation of the basis of this reaction shows that glyphosate and wheat straw fear interact in opposition, so the transport of these two herbicides is significantly reduced, resulting in poor control of K. scoparia.
Therefore, the combination of glyphosate and wheat straw may not be a viable option to control gdr k. scoparia.
Due to the widespread adoption of no-
Until agriculture, crop production in the Great Plains of North America is highly dependent on the use of herbicides.
However, due to the widespread and long-term use of herbicides with the same site of action, some weed species are resistant to herbicides, which is one of the main threats to sustainable crop production.
In addition, the rapid use of herbicides
Resistant crops, due to the lack of herbicide rotation, also contribute to the evolution of weed-resistant herbicides, thus increasing the selection pressure. (L. )Schrad. ()
Introduced to North America for viewing purposes.
Soon after its introduction, it became highly invasive on farmland and pastoral grounds.
Because it can endure drought, salinity, cold and the production of multiple seeds, and the rolling mechanism of seed diffusion, it has proved to be one of the most serious weeds on the Great Plains of North America.
If it is not managed in time, it will cause huge output losses to crops such as corn, sorghum, wheat, soybean and sugar beet.
Over the past three decades, this situation has been further exacerbated by the rapid and widespread spread of resistance to acetate enzymes
Optical System II-, 5-
Enolpyruvylshikimate-3-
Phosphate enzyme (EPSPS)-
Inhibitor and synthesis of auxins.
Management of herbicides, especially those that are
Resistance has become an important part of the planting system in the Great Plains of North America.
A combination of multiple herbicides is used to control a wider range of weeds and to minimize the use of herbicides.
More importantly, it is recommended that different herbicides be mixed in tanks to delay the evolution of weed population resistance to herbicides.
However, due to the incompatible or opposition between certain herbicide chemical groups, not all herbicides can be used in combination.
Prior to planting no-, the combination of glyphosate and wheat straw fear was recommended as a burn-out application
Till cotton controlling horse grass (L. ).
In Kansas, glyphosate and wheat straw fear are usually sprayed together to manage a variety of single-family plants and biqiweed species, including after the evolution and spread of glyphosate resistance in weed populations since 2007.
However, when applying a combination of glyphosate and wheat straw, inconsistent results suggest that the interaction between the two herbicides may be species-specific.
For example, sullivan and donovan reported hostile interactions between glyphosate and wheat straw, resulting in a decrease in phytotoxicity of glyphosate to single crops such as wheat (L. ), barley (L. )
And weeds such as Wild Oats (L. ).
Flint and Barrett report that the combination of glyphosate and mccatheris can reduce the efficacy of glyphosate on Johnson grass (L. )
Reduced absorption and transshipment.
European banks, by contrast.
It is recommended that the addition of wheat straw in glyphosate can increase the control of horse grass from 70% to more than 90%.
However, the response to the combination of glyphosate and wheat straw is not clear.
When the two are used in combination, if the two herbicides exhibit hostile interactions, this may result in a lower effective dose to these herbicides due to exposure, it may accelerate the evolution of glyphosate and/or the resistance to wheat straw, which in turn will weaken the choice of herbicide for this weed management. The glyphosate-and dicamba-resistant (GDR)
It is reported that the population of the Great Plains of the United States, including Kansas, has been widely distributed.
The importance of glyphosate and wheat straw in the joint prevention and control is not clear.
Therefore, it is important to study the interaction between glyphosate and wheat straw to assess whether the combined use of these herbicides contributes to better control of this weed.
In addition, because it is expected that the growers will accept the new glyphosate quickly-and dicamba-
Resistant crops, understanding the interactions of glyphosate and wheat straw is essential to maintain the sustainability of herbicide-resistant crops in infected areas.
Therefore, the objectives of this study are as follows: 1)
Test the efficacy of the combination of glyphosate and wheat straw on GDRin greenhouse and field conditions; and 2)
By comparing with known glyphosate, investigate the physiological interaction of glyphosate and wheat straw fear in GDRusing radioactive labeled herbicidesand dicamba-susceptible (GDS).
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