Research explores factors influencing soybean injury by synthetic auxin herbicides

September 14, 2020

WESTMINSTER, Colorado - September 14, 2020 - Synthetic auxin products have given growers an important option for managing weed populations resistant to glyphosate and other herbicides. But according to an article featured in the journal Weed Technology, there is one important downside to dicamba, 2,4-D and other synthetic auxins. They often move off-target and can cause severe injury to sensitive plants growing nearby.

Complaints about the issue persist, despite the introduction of products reported to have reduced volatility. For this reason, researchers from the University of Wisconsin-Madison decided to take a close look at factors that might influence synthetic auxin volatility and soybean injury, especially as it applies to the relationship between glyphosate and synthetic auxins commonly used in corn.

Their study found that four out of seven commercial formulations of dicamba and 2,4-D became highly acidic when mixed with glyphosate, which increased their potential for volatility. Glyphosate was shown to have a greater impact on pH than any other spray component or additive.

Among their other significant findings: High temperatures and low wind speeds in the 48 hours after a synthetic auxin application were found to result in greater injury to susceptible soybean plants. Dicamba was found to produce greater injury than 2,4-D. In addition, application of dicamba formulations late in the growing season were found to produce similar levels of soybean injury as applications made early in the season.
-end-
For further information on the study, read the article "Spray Solution pH and Soybean Injury as Influenced by Synthetic Auxin Formulation and Spray Additives," now available.

About Weed Technology

Weed Technology is a journal of the Weed Science Society of America, a nonprofit scientific society focused on weeds and their impact on the environment. The publication presents original research and special articles about weeds, crops and new technologies used for more effective weed management. To learn more, visit http://www.wssa.net.

Cambridge University Press

Related Herbicides Articles from Brightsurf:

Glyphosate residue in manure fertilizer decrease strawberry and meadow fescue growth
A new study finds that glyphosate residue from herbicides in manure fertilizer decrease the growth of strawberry and meadow fescue as well as runner production of strawberry.

Research explores factors influencing soybean injury by synthetic auxin herbicides
Synthetic auxin products have given growers an important option for managing weed populations resistant to glyphosate and other herbicides.

UQ researchers solve a 50-year-old enzyme mystery
Advanced herbicides and treatments for infection may result from the unravelling of a 50-year-old mystery by University of Queensland researchers.

Unraveling the mystery of wheat herbicide tolerance
Genetically speaking, the loaf of bread you stress-baked during the COVID-19 shutdown is more complex than you think.

Weed's wily ways explained in Illinois research
Like antibiotic-resistant bacteria, some herbicide-resistant weeds can't be killed by available chemicals.

Study documents the challenges of herbicide-resistant annual bluegrass in turf
In an study featured in the journal Weed Science, researchers in Australia examined 31 populations of annual bluegrass suspected to be herbicide resistant.

Overuse of herbicides costing UK economy £400 million per year
Scientists from international conservation charity ZSL (Zoological Society of London) have for the first time put an economic figure on the herbicidal resistance of a major agricultural weed that is decimating winter-wheat farms across the UK.

Palm oil: Less fertilizer and no herbicide but same yield?
Environmentally friendlier palm oil production could be achieved with less fertilizer and no herbicide, while maintaining profits.

Fighting a mighty weed
Weeds are pesky in any situation. Now, imagine a weed so troublesome that it has mutated to resist multiple herbicides.

Newly identified rice gene confers multiple-herbicide resistance
A rice gene that renders the crop resistant to several widely used beta-triketone herbicides has been identified, researchers report, revealing the genetic cause of herbicide susceptibility that has been identified in some important rice varieties.

Read More: Herbicides News and Herbicides Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.