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Northern Illinois Agriculture

University of Illinois Extension
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Crops are not the only things emerging in fields

Posted by Russel Higgins - Weeds

I encourage farmers to scout planted fields to evaluate crop stands, planter performance, and look for emergence issues. It is also an important time to evaluate the efficacy of pre-emergence herbicides. Waiting until we finish with soybean planting may leave fields with weeds that have already exceeded the size where they can successfully be controlled with post herbicide applications. Scouting at the NIARC we are finding abundant Lambsquarters and Giant ragweed. The weeds are present in fields that have yet to be treated, and in cases, those that have already received herbicide applications.

This week in the Illinois Bulletin Dr. Aaron Hager reported that a scouting trip last Thursday to the University of Illinois Palmer amaranth research location near Essex in Kankakee County revealed that Palmer amaranth plants had begun to emerge. Aaron shared that early and accurate identification of Palmer amaranth plants is an important component of an integrated management program, but doing so among seedling-stage pigweed plants sometimes can be difficult. As plants become larger and reproductive structures are present, identification becomes easier. He has provided photographs on the Illinois Bulletin web site that might help renew your pigweed species identification skills. I encourage you to visit the Bulletin web site to test your expertise. In a few days Dr. Hager will repost this story with the species identified.

http://bulletin.ipm.illinois.edu/?p=3168

 

Weather permitting we hope to resume planting operations at the NIARC tomorrow.

 

 



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