Chemical selector

Crop type: Corn
Application type: Preplant or Preemergence

Pounds of active ingredient per acre
Simazine 1 to 2
Product quantity per acre
1 to 2 qt Princep 4L/Simtrol/Simazine 4L, or 1.1 to 2.2 lb Princep Caliber 90/Simazine 90DF
Comments and limitations

Has more residual grass activity than atrazine and is less water soluble. Usually applied late preplant of preemergence at about 1 lb/acre. Do not soil incorporate. Does not have foliar activity. Can be used on sand, silt, and loam soils that are low in organic matter. Has longer carryover than atrazine. Follow label directions.

Pounds of active ingredient per acre
Simazine 1 to 2
Product quantity per acre
1 to 2 qt Princep 4L/Simtrol/Simazine 4L, or 1.1 to 2.2 lb Princep Caliber 90/Simazine 90DF
Comments and limitations

Has more residual grass activity than atrazine and is less water soluble. Usually applied late preplant of preemergence at about 1 lb/acre. Do not soil incorporate. Does not have foliar activity. Can be used on sand, silt, and loam soils that are low in organic matter. Has longer carryover than atrazine. Follow label directions.

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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