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: Corn
Application type: Postemergence
These herbicides may be applied postemergence to all corn types and hybrids. A supplemental label, which must be in possession at the time of application, allows the use of 1.0 fl oz Impact applied as a single application on pop, sweet, and field corn hybrids to control certain grasses or weeds larger than those listed on the original label. Apply with MSO or COC adjuvant and a nitrogen fertilizer source such as 1.25 to 2.5 gal of 28 to 32% nitrogen/100 gal of spray. MSO at 1% v/v is recommended for best performance. On corn up to 12 inches, a tank mix with 0.25 to 1.0 lb atrazine is recommended. Do not graze or feed treated corn for at least 45 days after application. Avoid cultivation for at least for at least 7 days after application. Impact is rainfast after 1 hour. Can rotate to winter cereals after 3 months and to alfalfa, canola, cotton, dry bean, sorghum, sunflower, or soybean after 9 months. Follow label directions.
These herbicides may be applied postemergence to all corn types and hybrids. Use the 1 fl oz Impact/Armezon applied as a single application on pop, sweet, and field corn hybrids to control certain grasses or large weeds. Apply with MSO or COC adjuvant and a nitrogen fertilizer source such as 1.25 to 2.5 gal of 28 to 32% nitrogen/100 gal of spray. MSO at 1% v/v is recommended for best performance. On corn up to 12 inches, a tank mix with 0.25 to 1 lb atrazine is recommended. Armezon can not be applied after the V8 stage of corn. Do not graze or feed treated corn for at least 45 days after application. Avoid cultivation for at least 7 days after application. These herbicides are rainfast after 1 hour. Can rotate to winter cereals after 3 months; and to alfalfa, canola, cotton, dry bean, sorghum, sunflower, or soybean after 9 months. If the 1 oz rate is used, canola, dry bean and peas can be planted after 18 months.