Chemical selector
The Pesticide Selector includes suggestions for chemical control of pests in Kansas crops, which are provided by K-State Research and Extension, and may not be relevant for states other than Kansas. We will continue to expand this tool for help in selecting other types of agricultural chemicals, and for other states. Contact the myFields Team if you are interested in contributing content!
The herbicide performance ratings are taken from: C.R. Thompson, D.E. Peterson, W.H. Fink, P.W. Stahlman, and J.W. Slocombe. 2020. Chemical Weed Control for Field Crops, Pastures, Rangeland, and Noncropland, Kansas State University, January 2016. Contribution no. 16-029-S from the Kansas Agricultural Experiment Station. Find it online at the bookstore.
The insecticide recommendations are taken from: B.P. McCornack, S. Zukoff, R.J. Whitworth, J.P. Michaud, and H.N. Schwarting. 2019. Insect Management Guides. March 2018. Kansas State University Agricultural Experiment Station and Cooperative Extension Service. PDF formats are available here.
Click here for a How-to Tutorial.
Crop type: Soybean
Application type: Preplant or Preemergence
Authority Supreme is a premix containing 2.08 lb of sulfentrazone + 2.08 lb of pyroxasulfone/gal. It may be applied in the fall before planting or spring up to 3 days after planting as a preemergence residual treatment for control of annual grasses and many broadleaf weeds including pigweeds, kochia, morningglory, and lambsquarters. The lower rates are for coarser textured soils with low organic matter, and the higher rates are needed on finetextured soils with higher organic matter content. Do not apply more than 6.9 oz per year on coarse textured soils. Do not use on sand soils with less than 1% organic matter. Do not plant wheat or corn for 4 months; sorghum for 10 months; triticale rye, or barley for 11 months; alfalfa or oats for 12 months; cotton for 12 to 18 months; or canola for 24 months after application.