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June 2013 Archive for Ask an Agronomist

RSS By: Farm Journal Agronomists, Farm Journal

Have your agronomic questions answered by a Farm Journal agronomist. E-mail us directly at TestPlots@FarmJournal.com, and we’ll respond on this blog to provide an interactive dialogue.

How Late Do I Need to Scout for Black Cutworm?

Jun 13, 2013

Question:  How late in the season do I need to check for black cutworms?

Answer: Don’t go by time of season as a lot of corn was planted late this year. Better yet, scout emerged corn weekly for black cutworm damage until the crop reaches the V5 growth stage. Check corn plants in four or five areas with each field. Problem signs are plant wilting, leaf discoloration and damage as well as missing and cut plants, not to mention the pest itself. If larvae found in the field are smaller than 3/4 of an inch, then a rescue insecticide is warranted if 2% to 3% of plants are wilted or cut.  If larvae are larger than 3/4 of an inch, the threshold increases to 5% cut plants.  Due to the high market price of corn and fluctuations in inputs, Iowa State University has a dynamic action threshold. The action threshold calculation determines when it is economical to treat for BCW based on plant population, expected yield, anticipated market value, and the cost of control:
http://www.extension.iastate.edu/CropNews/2009/0527hodgson.htm

Time to Scout for Cutworms

It’s prime time to be walking corn fields. Be on alert for cutworms.   It’s prime time to be walking corn fields, says Jim Jarman, University of Missouri agronomy specialist.

 

What You Need to Know about Black Cutworms

As corn begins emerging across the Corn Belt, unseasonably warm weather has farmers on high alert for black cutworms, and accurate scouting is a must.

Is There A Product That Keeps Birds From Eating Corn?

Jun 06, 2013

Is There A Product That Stops Birds From Eating Corn?

 Question: My dad and I have planted a small crop of corn again this year and we have had trouble with birds (crows, quail and blackbirds) pulling the corn up and eating the kennel.  The corn is in the V-2/V-3 stage.  I saw something about a product that would detour birds, but I can’t remember what that product is. Do you know what that product is?

 Answer: The product is called Avipel, and it does deter certain bird species from eating corn. To locate the product, you can call the Avipel help line at 1-800-468-6324.   This product has a Section 24C in some states, so you’ll need to call the company to determine whether it’s available for use in your state.

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