Weed Management in Nebraska Crop Production

Guide for Weed Management in Nebraska with Insecticide and Fungicide Information

Nebraska Extension EC130

Order print and downloadable digital editions at Marketplace.unl.edu. 

FieldWatch — Sensitive Crop Locator

From the Nebraska Department of Agriculture

FieldWatch identifies locations in Nebraska where sensitive crops such as grapes and organics are grown. After sensitive sites are identified, a pesticide applicator can take appropriate action to avoid injuring the crop due to herbicide drift, etc.

Publications on General Topics in Weed Science

 
Use of Herbicide Tolerant Crops as a Component of an Integrated Weed Management Program (NebGuide G1484, *PDF version, 290 KB; 4 pages). This NebGuide provides general guidelines for using herbicide tolerant crops in an integrated weed management program to ensure the long-term viability and profitability of this technology while protecting natural resources.

A Quick Test for Herbicide Carryover in the Soil (NebGuide G1891, *PDF version, 745 KB; 3 pages). How can you tell if you have herbicide carryover in your fields? Plants grown in soil samples can tell.

Weed Targeting Herbicide Management: Precision Agriculture (EC708, PDF, 358KB; 6 pages). Site-specific weed management and herbicide application is an effective way to minimize herbicide costs, maximize weed control and prevent unnecessary environmental waste. This publication, part of the precision agriculture series, explains basic principles of site-specific weed control.

Related Articles

Field with giant ragweed at early treatment stage

Considerations for Managing Herbicide-Resistant Weeds in Soybeans: Spring Burndown April 28, 2017

One of the challenges with spring burndown application is timing. Wet and windy conditions can delay spraying and under these conditions weeds can grow significantly in a few days. Waiting until planting to spray troublesome weeds such as marestail may be too late to achieve adequate control. In addition, waiting until soybean planting limits the available herbicide options since there are relatively few labeled effective burndown chemicals for spraying at this time. The following section identifies key treatment aspects to consider for several resistant varieties in Nebraska.

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soybean seedling

Timing is Critical with Pre-Emergence Flumioxazin-Based Herbicides in Soybeans April 26, 2017

Soybean planting has started in Nebraska and it’s time to apply pre-emergence herbicides. Six weeds have evolved resistance to glyphosate in Nebraska. The best way to effectively control resistant and other hard-to-control weeds is by applying residual, pre-emergence herbicides with multiple effective modes of action. Several new herbicides recently registered in soybean are in this category and could be considered.

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Field of soybeans
Figure 1. If a fomesafen-based herbicide (Flexstar/ Flexstar GT/ Marvel/Rumble) was applied in soybean in 2016, maintain 10 months of planting interval to corn this year.

Planting Interval of Corn after Previous Year's Soybean Herbicides April 21, 2017

Corn-soybean is the most common cropping system in eastern Nebraska. While corn growers are getting ready for planting this season, it is important to pay attention to the planting interval of herbicides applied the previous year in soybean. Certain soybean herbicides have relatively longer planting intervals for corn, especially if they are applied post-emergence in soybean. This is particularly important because soybean planting was late last year in much of Nebraska due to May rains. This caused postemergence herbicides to be applied later in the season than they might normally be, making it important that you pay attention to the planting interval.

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Postemergence Weed Control in Alfalfa April 21, 2017

Are you finding weeds in your new alfalfa?  Vigorous weed growth this spring may make it extra tough for your seedlings as weeds reduce growth of new alfalfa by shading and competing for moisture. 

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Center pivot irrigated soybeans
Management in a successful soybean-after-soybean cropping system may require growers to make some slight adjustments in their practices, including irrigation, seed selection, and pest management.

Planting Soybean after Soybean (Part 2): In-Season Management Considerations April 13, 2017

In Part 1 of this article, we look at considerations for planting soybean after soybean. In this article, Part 2, we share considerations for in-season management.

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