Dicamba research looks at chemistry of volatility
November 5, 2020 By Julie Harker Filed Under: News
A chemical engineering professor has published a study that looked at how certain chemicals in current dicamba formulations might contribute to volatility and drift.
Dr. Kimberly Parker with Washington University in St. Louis tells Brownfield Ag News dicamba formulations contain amine, a chemical that is supposed to keep the herbicide in place, preventing it from going airborne. But, what they found was hydrogen bonds that were the key.
“My student actually looked into whether or not the molecular weight, the heaviness of the amine, alone could explain its effects and he found that it could not. And, in fact, it was these hydrogen bonds that were much more important for controlling the volatilization.”
Parker says her approach to research differs from others – such as the pH content in the water of the dicamba spray and its effects on volatility – and that a variety of studies is needed. Hers is a molecular approach…
“We’re hoping that this could continue to improve formulation design and really get to the bottom of what actually is necessary to prevent dicamba drift from occurring.”
Parker says they are also looking at other chemicals that could have an impact on volatility. Her research is published in the Journal of Environmental Technology.
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