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: Alfalfa
Application type: Postemergence
Broadcast apply only to Roundup Ready alfalfa. Application to conventional alfalfa varieties will result in severe injury or death of the crop. Glyphosate products differ in concentration and adjuvant requirements. Refer to specific product labels for rate and adjuvant recommendations. Controls most annual and perennial weeds at the rates suggested on the label. Glyphosate has no residual activity, so multiple applications may be required through the season, particularly for control of both winter and summer annual weeds. The combined totatl per year for all in-crop applications should not exceed 6 qt of a 3 lb ae/gal glyphosate product. Condition spray solution with 1 to 2% spray-grade AMS by weight (8.5 to 17 lb/100 gal water) before adding glyphosate to the tank. Remove domestic livestock before application, and wait a minimum of 5 days after the last application before grazing, or cutting and feeding of alfalfa forage or hay.