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: Sorghum
Application type: Postemergence
A restricted-use pesticide. It can injure sorghum on calcareous soils. Controls broadleaf weeds more effectively than grasses. The 2 lb/acre rate is permissible only when no atrazine was applied before sorghum emergence. Postemergence atrazine rates over 1 lb/acre are not considered best management practices because of high potential for movement in surface water runoff. Apply before weeds are 1.5 inches tall and before sorghum exceeds 12 inches. Do not plant treated fields to any crop other than sorghum or corn for 18 months after application. Apply with 1% v/v COC or 0.25% v/v NIS to enhance foliar uptake. Follow atrazine rate limits and cropping, feeding, and grazing instructions on label.
A restricted-use pesticide. It can injure sorghum on calcareous soils. Do not use on sands and loamy sands, or injury can occur. Controls broadleaf weeds in western Kansas. Apply when sorghum is 6 to 12 inches high. Add COC or NIS according to label. Follow atrazine rate limits and precautions on label.
Atrazine is a restricted-use pesticide. These premixes of 1 lb bromoxynil and 2 lb atrazine/gal control many broadleaf weeds. Use up to two applications per season when weeds are small and growing actively but before they reach size limits listed on the label. Apply after 2- to 4-leaf stage but before grain sorghum is 10 inches tall. Can be tank mixed with dicamba to increase control of pigweeds, kochia, and field bindweed. Tank mixing with up to 8 oz/ acre 2,4-D increases control of devilsclaw and field bindweed but also increases potential for sorghum injury. Bromoxynil plus atrazine application is considered an atrazine best management practice for use in sensitive watersheds because the low rate of atrazine reduces runoff loss potential. Do not cut forage for feed or allow grazing within 30 days of treatment. Follow atrazine rate limits and label directions.
This is a premix of dicamba and atrazine (a restricted-use pesticide) for control of many broadleaf weeds, including triazine-resistant species. For best performance and least crop injury, apply when sorghum has 2 to 5 leaves and weeds are less than 6 inches tall. Banvel-K + atrazine application is considered an atrazine best management practice for use in sensitive watersheds because the low rate of atrazine reduces potential for runoff loss. Follow atrazine rate limits and label directions.