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Prospective Students Current Students Faculty & Staff Alumni Industry Start your application today Undergraduate Admissions Graduate Admissions Dual Degree Program Graduate applicants: Attend an info session and skip the application fee Search Trending Searches graduate admissions academic programs financial aid academic calendar maps & directions summer school Home News & Events WashU Expert: How does dicamba drift? WashU Expert: How does dicamba drift? Research from Kimberly Parker may have identified the source of the drift trouble Leah Shaffer  02.19.2024 (Photo: Shutterstock) Share Share on Facebook Share on Twitter Share on Linkedin Email A decision this month by the&＃160;U.S. District Court of Arizona&＃160;overturned the Environmental Protection Agency&＃8217;s 2020 reapproval of three dicamba-containing products produced by agricultural companies Bayer, Syngenta and BASF. The main point of contention in dicamba use is that it can drift into the air, to neighboring farms, where it can potentially damage crops not engineered to tolerate the weed-killing chemical. While regulatory implications are still being sorted, environmental engineers at the McKelvey School of Engineering at Washington University in St. Louis have been studying the issue as to why the herbicide drift continues to vex farmers. Kimberly Parker,&＃160;an assistant professor of energy, environmental and chemical engineering, studies dicamba in the lab under different variables to determine the mechanisms behind how it turns into vapor, a process called volatilization. Her lab has found that the dried residue of dicamba&＃160;&＃8212; rather than its liquid form, which is applied to plants like soybean and cotton &＃8212; could be the source of the drift trouble. Herbicides are typically made in a concentrated solution that is mixed with water. The water mixture changes the chemical nature of dicamba, which, by itself is a semi-volatile compound, meaning it can turn airborne. When mixed with other chemicals in water, dicamba becomes charged and is no longer volatile. But the water solution dries quickly after application, and that&＃8217;s where things go awry. &＃8220;We think a lot of the volatilization may be happening after these droplets have dried out to a film or residue,&＃8221; Parker said.&＃160;Much of her lab&＃8217;s work is investigating&＃160;how the chemistry of dicamba changes when it&＃8217;s in residue form. Read the full story here. Click on the topics below for more stories in those areas Research Energy, Environmental & Chemical Engineering Back to News Faculty in this story View Profile Kimberly Parker Assistant Professor You may also be interested in: Advancing robot autonomy in unpredictable environments Yiannis Kantaros will enable teams of robots to interact collaboratively, perceive and respond to their environment with a CAREER Award from the National Science Foundation. 06.10.2024 DEMIST artificial intelligence tool may enhance usability of medical images A deep-learning-based image denoising method developed by Abhinav Jha may improve detection of myocardial defects in low-count SPECT scans. 06.04.2024 Quantum physics may help lasers see through fog, aid in communications JT Shen to pioneer two-color quantum photonic laser with DARPA grant. 06.04.2024 Facebook Twitter LinkedIn Instagram YouTube Engineering Departments Biomedical Engineering Computer Science & Engineering Division of Engineering Education Electrical & Systems Engineering Energy, Environmental & Chemical Engineering Mechanical Engineering & Materials Science Sever Institute - professional degrees Technology & Leadership Center - training for industry Contact Us Washington University in St. Louis McKelvey School of Engineering MSC: 1100-122-303 1 Brookings Drive St. Louis, MO 63130-4899 Contact Us Resources COVID-19 Resources Canvas Directory Equity, Diversity & Inclusion Emergency Management Engineering IT Maps & Directions Make a Gift WebFAC / WebSTAC ©2024 Washington University in St. Louis. 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