​​​​Droplet Size Effects on Foliar Fungicide Efficacy in Soybean

March 2017 | 12 min., 05 sec.
by Shawn Butler
The University of Tennessee

Summary

​The introduction of future herbicide-tolerant crops will require growers to utilize drift-reduction nozzles that apply pesticide solution in very coarse to ultra coarse droplets. Historically, fungicides have been recommended to be applied in smaller droplets which provide greater coverage. This presentation will help consultants and producers understand the effects of nozzle selection on foliar disease management in soybean. Specifically, viewers will gain an overview of nozzle selection and generation of droplet spectra, the effects of droplet size on foliar fungicide efficacy and residual, and spray deposition of a foliar fungicide from varying droplet spectra in a commercial application setting. At the conclusion of this presentation, consultants and producers show feel comfortable in understand factors to consider when selecting spray nozzles to apply fungicide solutions in soybean.

About the Presenter

Shawn ButlerShawn Butler earned his BS at the University of Tennessee at Martin, majoring in Agricultural Sciences, and his MS at the University of Tennessee at Knoxville, where he majored in Plant Pathology. Shawn first began conducting application technology work during his undergraduate years while employed as a student assistant in Dr. Larry Steckel's weed science program at the University of Tennessee. Shawn continued working with application methods in his MS program under the direction of Dr. Heather Kelly at the University of Tennessee. He is now employed as a Research Associate to Dr. Tyson Raper at the University of Tennessee. Shawn is currently a PhD candidate, with project emphasis on utilizing an aerial platform to build a replant decision making tool. His research emphasis have specifically been with corn, cotton, soybean, and wheat management.​

Contact Information:
Email: sbutle14@utk.edu

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