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: Army Cutworm, Army Cutworm
Signal word on label is WARNING. Do not apply more than once per cutting or four times per year. For aerial applications use 2 to 5 gallons of water per acre. For best coverage when using ground application, a minimum of 20 gallons of water per acre with hollow cone nozzles is recommended. Chemigation is allowed. See label for more information. To avoid contamination of irrigation tail water, do not flood irrigate within 24 hours following an application of chlorpyrifos. Highly toxic to bees exposed to direct treatment. Some phytotoxic symptoms may be observed on young, tender, rapidly growing alfalfa. REI is 24 hours. Do not cut or graze treated alfalfa within seven days after applications of 0.25 lb. a.i./acre, 14 days after applications of 0.5 lb. a.i./ acre, or within 21 days after application exceeding 0.5 lb a.i./acre.