Herbicide-Resistant Weeds

screen shot of resistance calculator web application

Herbicide Resistance Risk Calculator: A New Resistance Management Tool

October 29, 2020
In order to calculate an herbicide resistance risk score, four years of crops need to be entered. Once herbicides are chosen for all four years and a weed species is selected, the model will calculate an herbicide resistance risk score for each herbicide site of action that was selected.

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palmer amaranth research plot

How to Control Palmer Amaranth in Dry Beans in Nebraska

September 10, 2020
Palmer amaranth emergence occurs throughout the season, generally from early May to late August. Consequently, weed control programs targeting Palmer amaranth need to provide season-long control, or from planting through canopy closure.

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Palmer amaranth
Palmer amaranth in conventional soybean field is difficult to control (Photo by Amit Jhala).

Palmer Amaranth and Velvetleaf Control in Conventional Soybean Using Overlapping Residual Herbicide Programs

April 30, 2020
With the depressed corn and soybean prices in recent years in the United States, growers have shown interest in conventional soybean. Herbicide programs should be selected carefully that provide season-long weed control.

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kochia plant growing in a field

Burndown and Pre-emergence Herbicides for Weed Control in Corn and Soybean

April 2, 2020
Profitable crop production starts with a weed control program that includes pre-plant and/or pre-emergence herbicides to deliver long-lasting, residual weed control. A spring burndown program in corn and soybean provides effective weed control to prepare for planting and helps to decrease the seedbank during the season.

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weeds

Take Action Free Webinar Series: Weed & Herbicide Management

February 24, 2020
The United Soybean Board (USB) Take Action initiative and university weed scientists across the Midwestern United States have developed a free webinar series covering various weed and herbicide management topics.

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weed science school flyer

Weed Science School Jan. 29 near Mead

January 9, 2020
University, government, and industry speakers will address current weed science issues as well as recommendations for improving herbicide applications. The school will be held at the Eastern Nebraska Research and Extension Center near Mead, starting at 8:30 a.m. and ending at 3.45 p.m.

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Figure 1. Glyphosate-resistant Palmer amaranth infesting corn field in south central Nebraska. (Photo by Amit Jhala)
Figure 1. Glyphosate-resistant Palmer amaranth infesting corn field in south central Nebraska. (Photo by Amit Jhala)

Glyphosate-Resistant Palmer Amaranth Field Day July 11

June 25, 2018
Is glyphosate-resistant Palmer amaranth a growing challenge? View field demonstrations and hear from experts at the Glyphosate-Resistant Palmer Amaranth Management Field Day Wednesday, July 11 at Carleton.

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field pennycress post herbicide app
Figure 1. Survival of field pennycress due to application of burndown herbicide when the temperature was below 40°F for an extended time. (Photos by Amit Jhala)

Low Temperature and Frost May Affect Efficacy of Burndown Herbicides

November 9, 2017
In many areas fall herbicide applications were delayed due to the late harvest. Applications can still be effective, depending on weeds present, temperature, rate of herbicide and additives used. The article offers recommendations for these late-fall applications and their importance, particularly for control of herbicide-resistant marestail.

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