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 Maxx is a premix containing 62% sulfentrazone and 3.9% chlorimuron that is more suitable for some areas than Authority XL. Can be applied preplant in the fall or spring, or preemergence until 3 days after planting for residual broadleaf weed control and some grass suppression. The lower rates are for coarse-textured soils with low organic metter, and higher rates are needed on fine-textured soils with higher organic matter content. Do not apply to soils with a pH greater than 7.6. Do not rotate to wheat or barley for 4 months; field corn for 10 months; oats or alfalfa for 12 months; sorghum for 10 to 18 months; cotton for 12 to 18 months; sunflower for 18 months; or canola for 36 months after application. Do not feed treated soybean forage or hay to livestock.