Those interested in learning the latest in weed management technologies and herbicides for weed control in corn, soybeans and sorghum are invited to attend Nebraska Extension Weed Management Field Day to be held on Wednesday June 26, 2024 from 9 am to 1 pm at South Central Ag Lab near Clay Center, NE. The Field Day is free to attend and lunch; UNL Dairy Store Ice cream will be provided. Register is required at https://agronomy.unl.edu/fieldday.
Tour one features onsite demonstrations of new technology/herbicides for weed control in soybeans in sorghum such as:
- Planting Green and Residual Herbicide Interaction in soybean: Planting green refers to no-till planting of the primary crop into actively growing cover crop. Cereal rye is the most planted cover crop in corn/soybean cropping systems in Nebraska. The objectives of this project are (1) To evaluate effect of planting green on performance of residual herbicides applied pre-emergence for weed control in soybean, and (2) Effect of early termination of cereal rye versus planting green on weed control and soybean yield.
- Inter-seeding Small Grains (Barley, Oat, and Wheat) in Soybean for Weed Suppression: Evaluate the effect of inter-seeding small grains into soybean on weed suppression and soybean yield and grain quality.
- Comparison of Herbicide Programs for Weed Control in Soybean: Unbiased comparison of herbicide programs of different companies for weed control in Roundup Ready 2 Xtend and Enlist soybean. New herbicides and multiple herbicide-resistant soybean will be discussed for management of herbicide-resistant weeds.
- Evaluating Residual Herbicides for Overlapping Residual Weed Control in Soybean: Can we achieve season-long weed control in soybean by using residual herbicides applied pre-emergence and post-emergence without a foliar active herbicide? This project will discuss the possibility of complete residual weed control in soybean.
Tour two features onsite demonstrations of new technology/herbicides for weed control in corn such as:
- Comparison of Herbicide Programs for Weed Control in Corn: Unbiased comparison of herbicide programs by different companies for weed control in Roundup Ready/LibertyLink corn. New herbicides in corn will be discussed.
- Control of Corn Volunteers in Enlist Corn: Volunteer corn is a major weed in corn-soybean cropping systems. Project will demonstrate how to control volunteer corn in Enlist corn using Assure II and a premix of glufosinate (Liberty) + quizalofop (Assure II).
- Evaluating Surtain (saflufenacil + pyroxasulfone) for weed control and crop safety in corn & popcorn: Surtain is the new Kixor herbicide based on solid-encapsulation technology, enabling pre- and early-post-emergence application for weed control in corn.
- Control of Corn Volunteers in iGrowth and Double Team Sorghum: When sorghum is planted after corn, corn volunteer is a major weed. iGrowth sorghum is a new herbicide-resistant sorghum that provides an opportunity for post-emergence control of grass weeds, including corn volunteers. ImiFlex (imazamox) and Zest (quizalofop) will be evaluated for control of volunteer corn.





The weed management field day will include on-site demonstrations of herbicides for weed control in corn, popcorn, and soybean as well as a view of ongoing cover crop research. An early morning demonstration will focus on weed control in soybeans followed by a demonstration of projects for weed control in corn, popcorn and sorghum. Onsite demonstration of cover crop research will highlight the afternoon session.
Growers, crop consultants and educators are encouraged to attend Nebraska Extension’s Weed Management Field Day from 8 a.m. to 1 p.m. June 29 at the South Central Agricultural Laboratory near Clay Center. The field day will include on-site demonstrations of new technology and new herbicides for corn, soybean and sorghum. An early morning tour will focus on weed management in soybeans followed by a tour of weed management in corn and sorghum. Field experiments will provide information for weed control options using several herbicide programs.
Growers, crop consultants and educators interested in management of herbicide-resistant Palmer amaranth are encouraged to attend Nebraska Extension’s Field Day, supported by the Nebraska Corn Board, from 8:30 a.m. to 1:30 p.m. July 12 near Shickley. Palmer amaranth is a member of the pigweed family and is one of the most troublesome weeds in seed cornfields because of its resistance to atrazine and HPPD inhibitors. Greenhouse dose-response studies have confirmed resistance when atrazine and HPPD inhibitors were applied post-emergence. Palmer amaranth is of particular concern in south-central Nebraska because of its proximity to intense seed corn production, which is heavily reliant on these herbicides for weed.