Plant Wheat into Clean Field after Corn

Corn harvest is underway, and some of those acres are going into winter wheat production soon thereafter. NC State professor emeritus in weed science, Dr. Alan York has this concerning planting winter wheat into a clean field:

“When we begin to get this corn out, it depends on how good a job we did in the corn crop itself controlling weeds. If we got a lot of weeds out there, whether or not it’s going to be a concern for wheat, that will depend on what kind of wheat you have and when you are planning to plant it. If we are going to wait till after a frost, then that will take care of most of the things, but you may still have some residue in the way. “
 

And for those fields intended for a double-crop that simply didn’t get planted:
 

“This is the same thing for these fields where because of all the wet weather we’ve had, we couldn’t get double crop soybeans planted. So there are a lot of fields open now. We don’t want a lot of those weeds going to seed for future years.”

York explains there are a couple of options when cleaning up fields before planting winter wheat:
 

“Tillage is always an option. The other one is herbicides. It depends on what you are going after that will affect what herbicides you choose. If we don’t have a glyphosate resistant weed out there, than that is the probably the material of choice, particularly if we are not in a hurry. With the palmer amaranth, we need to look for another option like 2-4D, or dicamba, but the most effective thing is paraquat, we have data spraying palmer after corn harvest and its done very well.”

Of course, the goal here is to reduce the seed bank for resistant Palmer Amaranth says York:
 

“We are working hard trying to get people to take this seed bank seriously and to have long term success we need to work these populations down.”

Professor emeritus in weed science, NC State’s Dr. Alan York.
 


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