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Weeds may show effect and become stunted, but may survive.

Tom Bechman 1, Editor, Indiana Prairie Farm

May 29, 2012

2 Min Read

Careful scouting of a cornfield recently after application of a combination mix of post herbicides at the V2 to V3 corn leaf stage turned up scattered marestail and trumpet creeper plants. Fortunately, they are few and far between. The leaves were burnt back, especially on the trumpet creeper, and on the top of the marestail. Green growth was sneaking in under the marestail from the lower leaves.

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If it's very spotty and a plant here and there, it's not likely to affect yield. However, Tom Jordan, a Purdue University weed control specialist, says that if your goal is to get the weed s out of the field, there are herbicides that will do iti. The only catch is that if it's only spotty weeds, you may want to go out with a backpack sprayer and apply the herbicide directly. Rather than spray herbicide over the entire field.

"It's a lot of work but if you're just trying to clean up a field and the weeds are spotty, you can cover quite a few acres in half a day with a backpack sprayer," he says.

First, consider trumpet creeper. The best product for this perennial is dicamba. A brand name that contains dicamba is Clarity. "If you can give them a shot with Clarity, it will help take care of them," Jordan says.

Part of how effective it is depends upon the age of the trumpet creeper and the underground root system it has established. If it's a young vine, it's more likely to be wiped out permanently than if it's an established vine with a large underground root mass.

For marestail, you could knock them all the way out with 2,4-D, Jordan says. However, 2,4-D won't do much for trumpet creeper. An application of Clarity will get both.

If the weeds are spotty, it likely won't affect yield. Part of the reason for controlling the weeds, especially trumpet creeper, a tough perennial, would be to prevent future problems with the weed.

About the Author(s)

Tom Bechman 1

Editor, Indiana Prairie Farm

Tom Bechman is an important cog in the Farm Progress machinery. In addition to serving as editor of Indiana Prairie Farmer, Tom is nationally known for his coverage of Midwest agronomy, conservation, no-till farming, farm management, farm safety, high-tech farming and personal property tax relief. His byline appears monthly in many of the 18 state and regional farm magazines published by Farm Progress.

"I consider it my responsibility and opportunity as a farm magazine editor to supply useful information that will help today's farm families survive and thrive," the veteran editor says.

Tom graduated from Whiteland (Ind.) High School, earned his B.S. in animal science and agricultural education from Purdue University in 1975 and an M.S. in dairy nutrition two years later. He first joined the magazine as a field editor in 1981 after four years as a vocational agriculture teacher.

Tom enjoys interacting with farm families, university specialists and industry leaders, gathering and sifting through loads of information available in agriculture today. "Whenever I find a new idea or a new thought that could either improve someone's life or their income, I consider it a personal challenge to discover how to present it in the most useful form, " he says.

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