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: Preplant or Preemergence
A restricted-use pesticide. Upper rate limits depend on soil texture, percentage plant residue cover, and NRCS soil erodibility classification. Controls small-seeded broadleaf weeds and helps suppress other broadleaf weeds and annual grasses. Apply preplant and incorporate or apply before corn emerges. Recropping options depend on soil pH, rate, and timing of application. Atrazine carryover is longer in higher pH soils. Caution: Because atrazine moves readily with water, surface runoff losses on fine-textured soils and leaching in coarse-textured soils can impair water quality. See K-State Research and Extension publication MF-2208 for atrazine best management practices. Follow label directions for rates, cropping, and feeding limitations. No-till, Fall Application: Atrazine can be applied to Kansas row-crop stubble from fall harvest to December 31 to control winter annual weeds and reduce or eliminate the need for burn-down herbicide application or preplant tillage in spring. Apply with COC to enhance foliar activity. Tank mixing with 2,3-D LVE enhances control of dandelion and other broadleaf winter annual weeds. Can be tank mixed with Gramoxone SL to enhance control of cheat, downy brome, and Japanese brome. For highly erodible soils with less than 30% plant residue cover, limit fall application to a maximum of 1.6 lb. total atrazine applications must not exceed 2.5 lb/acre per calendar year. Do not apply to frozen ground or where soil surface conditions favor wind erosion. Do not plant any crops except corn, grain sorghum, or forage sorghum in the following spring. Follow directions on 24(C) Special Local Need label for Kansas. No-till, Early Preplant Application: Atrazine can be applied in spring up to 45 days before planting. If weeds are present at time of treatment, but before crop emergence, atrazine may be tank mixed with Gramoxone SL or glyphosate. Apply with COC or NIS to enhance foliar uptake. Avoid tillage after application. Applying about two-thirds of the atrazine dose early preplant and one-third at planting time is a best management practice.
A restricted-use pesticide. Upper rate limits depend on soil texture, percentage plant residue cover, and NRCS soil erodibility classification. Controls small-seeded broadleaf weeds and helps suppress other broadleaf weeds and annual grasses. Apply preplant and incorporate or apply before corn emerges. Recropping options depend on soil pH, rate, and timing of application. Atrazine carryover is longer in higher pH soils. Caution: Because atrazine moves readily with water, surface runoff losses on fine-textured soils and leaching in coarse-textured soils can impair water quality. See K-State Research and Extension publication MF-2208 for atrazine best management practices. Follow label directions for rates, cropping, and feeding limitations. No-till, Fall Application: Atrazine can be applied to Kansas row-crop stubble from fall harvest to December 31 to control winter annual weeds and reduce or eliminate the need for burn-down herbicide application or preplant tillage in spring. Apply with COC to enhance foliar activity. Tank mixing with 2,3-D LVE enhances control of dandelion and other broadleaf winter annual weeds. Can be tank mixed with Gramoxone SL to enhance control of cheat, downy brome, and Japanese brome. For highly erodible soils with less than 30% plant residue cover, limit fall application to a maximum of 1.6 lb. total atrazine applications must not exceed 2.5 lb/acre per calendar year. Do not apply to frozen ground or where soil surface conditions favor wind erosion. Do not plant any crops except corn, grain sorghum, or forage sorghum in the following spring. Follow directions on 24(C) Special Local Need label for Kansas. No-till, Early Preplant Application: Atrazine can be applied in spring up to 45 days before planting. If weeds are present at time of treatment, but before crop emergence, atrazine may be tank mixed with Gramoxone SL or glyphosate. Apply with COC or NIS to enhance foliar uptake. Avoid tillage after application. Applying about two-thirds of the atrazine dose early preplant and one-third at planting time is a best management practice.
No-Till: These are premixes of dicamba and atrazine (a restricted-use pesticide). They control many broadleaf weeds when applied before planting no-till corn. Do not apply to coarse-textured soils or soils with less than 2% organic matter. Contact your corn seed company before using this product on seed corn or specialty corn. Follow atrazine rate limits and label directions.
No-Till: These are premixes of dicamba and atrazine (a restricted-use pesticide). They control many broadleaf weeds when applied before planting no-till corn. Do not apply to coarse-textured soils or soils with less than 2% organic matter. Contact your corn seed company before using this product on seed corn or specialty corn. Follow atrazine rate limits and label directions.