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.
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Crop type: Corn
Application type: Postemergence
Callisto Xtra is a restricted-use pesticide for use on field corn, silage corn, and yellow popcorn. Controls broadleaf weeds. Apply Callisto Xtra after crop emergence but before corn exceeds 12 inches in height. Apply with COC at 1% v/v (do not use MSO). You may add AMS at 8.5 to 17 lb/100 gal spray solution. Temporary crop response may occur under extreme weather conditions when crop is under stress. Can be applied with glyphosate in glyphosate-tolerant corn (refer to glyphosate label for proper adjuvant use). Do not apply to corn that has been treated with Counter or Lorsban (organophosphate) inseticides, as severe crop injury may occur. Can rotate to all corn or grain sorghum immediately and to alfalfa, barley, canola, cotton, potatoes, soybean, sunflower, and wheat the spring following application. All other crops can be planted after 18 months. Follow label directions.
Callisto GT may be applied at 2 pt/acre to glyphosate-tolerant corn from emergence up to 30 inches tall showing 8 leaves or less, whichever is most restrictive. Apply Callisto GT with 0.25 to 0.5% v/v NIS and 8.5 to 17 lb of AMS/100 gal of spray solution. COC at 1% v/v may be substituted for the NIS, but, there is increased risk of temporary (<7 days) crop injury. Atrazine may be included in the tank mixture. Atrazine rate will depend on atrazine used preemergence as well as atrazine restrictions for the soil type or area. Follow label directions.
Apply mesotrione from emergence to 8-leaf stage of corn. Always add COC at 1% v/v (1 gal/100 gal spray). Note label for insecticide restrictions. Controls many annual broadleaf weeds. Mesotrione is rainfast after 1 hour. For corn up to 12 inches tall, mesotrione may be used in combination with atrazine at 0.25 to 0.75 lb/acre or in combination with Bicep II Magnum or Lite Magnum. Can rotate to winter wheat 4.5 months after application and to cotton, soybean, or sorghum the following spring. See label for sprayer cleanup after application. Follow label directions.