Crop Chemicals

Postemergence Corn Herbicide Considerations

Fri, 18 May 2012 20:58:00 +0000

Source: Purdue Extension

The eastern Corn Belt's early corn crop has started to – and so have the weeds. So now is the time for growers to consider postemergence herbicide applications, says Travis Legleiter, a Purdue Extension weed specialist. In the northern part of the Corn Belt, some of the crop is as far along as the V3, or third leaf, growth stage. Development is even further along in some fields in the southern part of the region. That means corn farmers need to prepare to apply the right postemergence herbicide at the right time, likely within the next few weeks.

7 Factors Affecting Herbicide Injury to Corn

Thu, 17 May 2012 20:11:00 +0000

Source: University of Illinois

During the past week, the number of observations and inquiries related to corn injury from herbicides increased, says University of Illinois Associate Professor of Weed Science Aaron Hager. Instances of corn injury appear to be fairly widespread across the state. Direct application of postemergence herbicides and persistence of herbicides applied last season appear to be responsible for much of the injury.

Monitor Weed Control with Aerial Imagery

Mon, 14 May 2012 20:46:00 +0000

Source: Iowa Soybean Association On-Farm Network

It’s been another abnormal spring and many farmers have had to adjust some of their management practices. Specifically, the combination of the unusual weather and a need to get control of glyphosate-resistant weeds has increased the need to more closely scrutinize weed-management programs.

Tips for Nitrogen, Herbicide Application on Emerged Corn

Mon, 14 May 2012 20:37:00 +0000

By Bob Hartzler and John Sawyer, Iowa State University

The rapid pace of planting in late April followed by rain has resulted in many fields having emerged corn before pre-emergence herbicide and nitrogen applications have been completed. Of particular concern are no-till fields where planting was completed prior to killing emerged weeds.

Customize Postemergent Herbicide Applications

Fri, 11 May 2012 16:59:00 +0000

Source: Winfield Solutions

"In general, postemergent applications should be made before weeds get taller than 2-4 in., because that's when competition can begin to impact yields," says WinField Regional Agronomist Steve Barnhart. "Plus small weeds are a lot easier to control than larger ones." Because every field is different, there isn't a one-size-fits-all approach to turn to when it comes to planning postemergent herbicide applications.

Apply Postemergence Herbicide to Small Weeds in Corn

Fri, 04 May 2012 15:11:00 +0000

Source: University of Illinois

"The smaller the weed, the better," says University of Illinois Associate Professor of Weed Science Aaron Hager. Proper timing of the application of postemergence herbicides provides the corn crop with the best opportunity to express its full genetic yield potential. Allowing weeds to compete with the crop for too long reduces its seed yield. Yield losses can accumulate very rapidly, and the associated costs can far exceed the cost of an integrated weed management program that includes a properly timed application of a postemergence herbicide.

Options to Control Emerged Corn Before Replant

Thu, 19 Apr 2012 20:35:00 +0000

Source: University of Illinois

University of Illinois associate professor of weed science Aaron Hager says that the below-freezing temperatures last week damaged some emerged corn in some parts of Illinois. “While the damage appears not to be widespread, it is very likely that some growers will opt to replant damaged stands,” he says. Losses of the initial corn stand could range from complete to partial, so farmers may need to control existing corn plants before replanting.

Are Your Multiple-Mode Herbicides Effective?

Fri, 06 Apr 2012 15:25:00 +0000

Source: University of Illinois

Interest in using multiple modes of herbicide action in weed management programs is increasing, according to Aaron Hager, University of Illinois associate professor of weed science. However, each component of a herbicide premix or tankmix with multiple modes of action is not necessarily effective for every weed or under all application conditions.

Tankmix App Available

Thu, 22 Mar 2012 20:12:00 +0000

As you ready for spring planting and spraying, add a new tool to your arsenal: a tankmix app to help manage mix formulas and record what's going on which field and when. Precision Laboratories has launched Mix Tank 2.0, a "complete spray management tool," says Rick Wohlner, president of the company. "We launched 1.0 a year ago and have had over 7,000 downloads. The new version is simple, fast and it works."

Early Herbicide Applications Could Fail Farmers

Tue, 20 Mar 2012 19:20:00 +0000

Source: Purdue University

Although the calendar shows it's March, many Midwest farmers are preparing their fields for spring planting like it's the middle of April. That's not necessarily a good thing, says Purdue Extension Weed Specialist Bill Johnson.