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
A restricted-use pesticide. The 2 lb/acre rate ispermissible only when no atrazine was applied before corn emergence. Apply with COC in water before grasses, broadleaf weeds, and corn exceed 1.5, 4, and 12 inches in height, respectively. Do not plant treated field to crops other than corn (or sorghum in northeastern Kansas) during the same season. Postemergence atrazine rates over 1 lb/acre are not considered best management practices because of high runoff potential in surface water in sensitive watersheds (see K-State Research and Extension publication MF-2208). See label for directions, rates, recropping, and feeding limitations.
A restricted-use pesticide. The 2 lb/acre rate ispermissible only when no atrazine was applied before corn emergence. Apply with COC in water before grasses, broadleaf weeds, and corn exceed 1.5, 4, and 12 inches in height, respectively. Do not plant treated field to crops other than corn (or sorghum in northeastern Kansas) during the same season. Postemergence atrazine rates over 1 lb/acre are not considered best management practices because of high runoff potential in surface water in sensitive watersheds (see K-State Research and Extension publication MF-2208). See label for directions, rates, recropping, and feeding limitations.
Atrazine is a restricted-use pesticide. These premixes of 1 lb bromoxynil and 2 lb atrazine/gal control many seedling broadleaf weeds. Use up to two applications per season when weeds are small and actively growing but before they reach size limits listed on the labels. Apply after 3 to 4-leaf stage but before corn exceeds 12 inches in height. Can be tank mixed with dicamba to increase control of pigweeds, kochia, and field bindweed. Tank mixing with up to 8 fl oz 2,4-D increases control of devilsclaw and field bindweed but increases potential for crop injury. Can be tank mixed with Accent for shattercane control. Bromoxynil plus atrazine application is considered an atrazine best managment practice for use in sensitive watersheds because the low rate of atrazine reduces the potential for runoff loss. Do not feed forage or allow grazing within 30 days of treatment. Follow label directions.
Atrazine is a restricted-use pesticide. These premixes of 1 lb bromoxynil and 2 lb atrazine/gal control many seedling broadleaf weeds. Use up to two applications per season when weeds are small and actively growing but before they reach size limits listed on the labels. Apply after 3 to 4-leaf stage but before corn exceeds 12 inches in height. Can be tank mixed with dicamba to increase control of pigweeds, kochia, and field bindweed. Tank mixing with up to 8 fl oz 2,4-D increases control of devilsclaw and field bindweed but increases potential for crop injury. Can be tank mixed with Accent for shattercane control. Bromoxynil plus atrazine application is considered an atrazine best managment practice for use in sensitive watersheds because the low rate of atrazine reduces the potential for runoff loss. Do not feed forage or allow grazing within 30 days of treatment. Follow label directions.
These are mixtures of dicamba and atrazine (a restricted-use pesticide) that can be applied to corn from the spike stage until the 5-leaf stage. Use drop nozzles if corn is more than 8 inches tall. Do not apply to corn over 12 inches tall. Use lower rate for coarse-textured soils. Do not use with adjuvants or liquid fertilizers, except as directed on labels. Can be tank mixed with Oulook Herbicide, Harness, Surpass, or pendimethalin, but these residual herbicides have no foliar activity. When tank mixing with Accent, add 1 qt NIS/100 gal spray mixture and 1 gal/acre UAN. Dicamba Herbicide plus atrazine application is considered an atrazine best management practice for use in sensitive watersheds because the low rate of atrazine reduces the potential for runoff loss. Follow atrazine rate limits.
These are mixtures of dicamba and atrazine (a restricted-use pesticide) that can be applied to corn from the spike stage until the 5-leaf stage. Use drop nozzles if corn is more than 8 inches tall. Do not apply to corn over 12 inches tall. Use lower rate for coarse-textured soils. Do not use with adjuvants or liquid fertilizers, except as directed on labels. Can be tank mixed with Oulook Herbicide, Harness, Surpass, or pendimethalin, but these residual herbicides have no foliar activity. When tank mixing with Accent, add 1 qt NIS/100 gal spray mixture and 1 gal/acre UAN. Dicamba Herbicide plus atrazine application is considered an atrazine best management practice for use in sensitive watersheds because the low rate of atrazine reduces the potential for runoff loss. Follow atrazine rate limits.