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 Elite is a premix containing 0.7 lb sulfentrazone and 6.3 lb s-metolachlor/gal. Can be applied in the spring as a preplant or preemergence treatment up to 3 days after planting for residual control of grass and small seeded broadleaf weeds. The lower rates are for coarse-textured soils with low organic matter, and higher rates are needed on fine-textured soils with higher organic matter content. Do not use on sandy soils iwth less than 1% organic matter. Do not rotate to wheat, barley, or triticale for 4.5 months; field corn or sorghum for 10 months; canola, oats, or alfalfa for 12 months; or cotton for 12 to 18 months after application. Do not graze or feed treated soybean forage, hay, or straw to livestock for 30 days after application.