Weed Management

Popcorn at V9 growth stage where PRE herbicide had been applied

Pre-emergence Herbicide Delays the Critical Time of Weed Removal in Nebraska Popcorn

September 9, 2019
Understanding the critical time of weed removal (CTWR) and how a pre-emergence herbicide application can shift it is helpful for designing the most efficient weed management program in popcorn.

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Wheat field with significant standing residue following harvest
Using a stripper header can leave significant standing residue to catch more snow in winter and reduce soil moisture evaporation. It also will taken longer to decompose, protecting the soil over a longer period. (Photos by Bob Klein)

Managing Wheat Residue and Controlling Weeds

August 30, 2019
Due to the late wheat harvest throughout western Nebraska, weeds growing in unharvested fields grew much longer than usual. In some fields weeds matured and produced seed. These weed control measures and residue management will be particularly important for the next wheat crop.

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Suspected off-target dicamba injury to soybean. Cupped leaves are often indicative of dicamba injury. (Photos by Amit Jhala)
Figure 1. Suspected off-target dicamba injury to soybean. Cupped leaves are often indicative of dicamba injury. (Photos by Amit Jhala)

Dicamba Off-Target Injury Continues in 2019 in Nebraska

August 16, 2019
As the crop season progresses, questions about dicamba off-target injury in soybean, broadleaf crops, and trees are increasing in Nebraska. If you suspect off-target injury in one of your fields, here's a reminder of what to do.

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Figure 1. Weeds that are cut off with the combine header will need to regrow before they can be controlled.
Figure 1. Weeds that are cut off with the combine header will need to regrow before they can be controlled.

Controlling Weeds Post-Harvest in Winter Wheat

July 12, 2019
Wet weather this year made timely herbicide applications in winter wheat difficult, allowing substantial weed populations to get a foothold. The author discusses cultural and chemical options for weed management.

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KSU: Pre-harvest Weed Control in Wheat - Sharpen Update

July 11, 2019
A Kansas State University weed scientist discusses pre-harvest options for managing weeds in winter wheat, including advantages and disadvantages of various labeled herbicides.

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Controlling Summer Annual Weeds in Alfalfa

June 26, 2019
Wet soils after alfalfa cutting can encourage weeds and grasses like foxtail, crabgrass, pigweed to grow quickly, but cultural and chemical control is possible.

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Mid-season Weed Management in Corn and Soybean

June 14, 2019
Managing weed escapes mid-season and late-emerging weeds can have a substantial impact on the spread of herbicide-resistant weed populations the following year. View the table of preemergence herbicides that can be applied postemergence.

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

Glyphosate-Resistant Palmer Amaranth Field Day July 10

June 7, 2019
Jason Norsworthy, a weed scientist from the University of Arkansas, will be the keynote speaker at this year's Glyphosate-Resistant Palmer Amaranth Management Field Day on Wednesday, July 10, near Carleton.

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