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: Alfalfa
Arthropod: Alfalfa Weevil
This pyrethroid insecticide is labeled restricted use due to toxicity to fish and aquatic organisms. Signal word on label CAUTION or WARNING depending on formulation. Use a minimum of 10 gallons of finished spray per acre by ground application and a minimum of 1 gallon of finished spray if applied by air. Can be chemigated; refer to label for details. REI is 12 hours. PHI for 0.1 lb. a.i./acre or less is 0 days. Above 0.1 lb. a.i./acre a 14-day PHI is required. Do not apply more than 0.2 lb. a.i./acre per cutting.