Weed Management

Weed Control Options in Seedling Alfalfa September 21, 2016

Late summer plantings of alfalfa tend to have fewer weeds than spring plantings, but this year, fall weeds may be a problem in some fields.

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Thistle Control During October September 21, 2016

It’s thistle time again. Even if they are hard to see, this is the time to control them.

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Controlling Winter Annual Bromes this Fall September 14, 2016

Early to miid-September is a good time to start controlling winter annual bromes in your pasture.

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Palmer amaranth
Palmer amaranth

Your Help Needed to Identify Palmer Amaranth Distribution in Nebraska September 2, 2016

Nebraska Extension is requesting help in identifying the distribution of Palmer amaranth in Nebraska by taking this short survey.

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Russian thistle in wheat stubble.
Russian thistle in wheat stubble.

Fall Weed Control Options for Winter Wheat August 31, 2016

Weed management is a long-term battle that needs to continue even in tight margin years.Although herbicide costs may seem prohibitive, it’s important to consider the long-term implications of limiting or eliminating the use of herbicides in crop production systems.Weeds left unmanaged after wheat harvest use valuable nutrients and water needed for the following year’s crop while producing seeds to replenish the soil seed bank.

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Debalin Sarangi, weed science postdoctoral research associate, describes the key identifying characteristics of broadleaf and grass weed species during weed management field day
Figure 1. Debalin Sarangi, weed science postdoctoral research associate, describes the key identifying characteristics of broadleaf and grass weed species during a 2016 weed management field day.

New Herbicides & Managing Multiple Herbicide-Tolerant Crops July 28, 2016

In Nebraska, eight weed species (common ragweed, common waterhemp, giant ragweed, kochia, marestail, Palmer amaranth, redroot pigweed, and shattercane) have been confirmed resistant to at least one herbicide.  Six of them — common ragweed, common waterhemp, giant ragweed, kochia, marestail, and Palmer amaranth — have been confirmed resistant to glyphosate in Nebraska. This article reviews information presented at the Weed Management Field Day at the UNL South Central Ag Lab, focusing on field demonstrations and methods to reduce the development of further herbicide resistance.

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Figure 1. Amit Jhala, Extension Weed Management Specialist discussing weed control and crop safety in new multiple herbicide-tolerant soybeans.
Figure 1. Amit Jhala, extension weed management specialist, discussing weed control and crop safety in new multiple herbicide-tolerant soybeans.

142 Attend 2016 Weed Management Field Day July 11, 2016

UNL weed management research was featured and demonstrated at the 2016 Corn and Soybean Weed Management Field Day June 29 at UNL’s South Central Agricultural Laboratory (SCAL) near Clay Center. Amit Jhala, Extension weed management specialist, organized and led the tour.

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Figure 1.  Red Willow County winter wheat variety plot.
Figure 1. Red Willow County winter wheat variety plot.

Post-Harvest Weed Control in Winter Wheat June 29, 2016

Timely control of weeds following winter wheat harvest can limit soil moisture loss to weeds and prevent the deposit of more weed seeds in the soil, two factors that can benefit the next crop's yield. In addition, timely control of volunteer wheat is essential in reducing the spread of wheat streak mosaic disease. See what influences effectiveness of weed control and how to make your crop more competitive.

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