Weed Management

Dormant Spraying for Alfalfa Weeds March 2, 2018

With temperatures beginning to warm up, now is a good time to manage weeds such as field pennycress, downy brome, mustards, cheatgrass, and shepherd's purse in dormant alfalfa without risking plant injury.

In the News March 1, 2018

Nebraska Extension specialists in the ag media discussing challenges of early season weed control, the good and the bad of cover crop insects, irrigated wheat production, and improving use efficiency of applied organic nitrogen.

Photo of field trial studying management of glyphosate-resistant ragweed

Herbicide Options for Managing Glyphosate-resistant Common Ragweed in LibertyLink Soybean March 1, 2018

Results from a 2017 weed management trial on glyphosate-resistant ragweed indicated two applications were often more efficient and cost effective than either three applications or one application of herbicide.

Figure 1. (left) Carryover injury of atrazine (2 lb ai/ac applied in the fall) and (right) mesotrione (applied in the spring) on field peas. — Figure 1. Carryover injury of atrazine (2 lb ai/ac applied in the fall) and mesotrione (applied in the spring) on field peas.

Field Peas—A Guide to Herbicide Carryover And Herbicide Efficacy February 22, 2018

How to avoid herbicide carryover injury when designing an effective herbicide program for crop rotations integrating field peas.

Figure 1. Season-long glyphosate-resistant common ragweed competition in a soybean field near Adams.

Preplant Tillage to Manage Glyphosate-resistant Common Ragweed February 13, 2018

Nebraska university weed scientists conducted research in 2017 to identify the effect of preplant tillage on weed emergence in an effort to develop an integrated weed management plan to control glyphosate-resistant weeds. Here's what they found.

Graph of stand frequency for two indiangrass varieties

Does Weed Control Method Impact Indiangrass Establishment and Persistence? February 5, 2018

This study evaluated two weed control methods and seeding rates on establishment and persistence of two indiangrass cultivars, ‘Oto’ and ‘NE 54’, from 2003 to 2007.

Herbicide label section — Figure 1. A careful read of the herbicide label provides important legal and educational information for your weed management program. An example of a group 2 herbicide from the sulfonylurea family and a list of other herbicides that belong to the same group and family. Paying attention to the group name makes it easier to ensure that herbicide(s) from the same group are not repeated within a growing season or the next year.

What Should You Look For in a Herbicide Label January 26, 2018

A herbicide label is a legal document providing important information about a herbicide, its appropriate use, and the precautions needed to avoid off-target movement and to protect environmental quality. It can also help you achieve the most efficient and sustainable application. Learn more about what to watch for on herbicide product labels.

Cover 2018 Guide for Weed, Disease, and Insect Management in Nebraska

2018 Weed, Disease, and Insect Management Guide January 11, 2018

The 2018 Guide for Weed, Disease, and Insect Management in Nebraska is now available in print or as a download. The 332-page guide offers a single, comprehensive resource based on Nebraska research and conditions.

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