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Northern Illinois Agriculture

University of Illinois Extension

Harvest continues


Harvest activities continue at the Northern Illinois Agronomy Research Center, our latest planted and last soybean were harvested this week. Much of the yield data will require closer scrutiny before final release of the results, but here are a few preliminary impressions from the combine seat. At our location, even in a favorable weather year, our continuous corn appears to fall significantly behind rotated corn in this year's long term rotation study. Our yields results also confirm the competitive nature of Giant ragweed in our herbicide trials, decreasing yields up to 40%. Several Giant ragweed seed samples from northern Illinois have been collected and forwarded to the University of Illinois to be evaluated for glyphosate resistance in greenhouse trials over the winter months. Overall, Most corn is being brought in at or above 200 bushels per acre; most soybean trials are exceeding 60 bushels to the acres. I'll look forward to sharing additional results from the research center when they are compiled.

Last week the US Environmental Protection Agency issued a report on the benefits of neonicotinoid insecticidal seed treatments to soybean production in the United States. Neonicotinoid insecticidal seed treatments include imidacloprid and thiamethoxam.

the following statements were pulled from the report.

  • "On average, from 2008-2012, neonicotinoid-treated seeds were applied on 30% of soybean acres, (with some individual years approaching 40% of soybean acres in selected corn belt states)."
  • Across the United States (2008-2012), 1,151,000 pounds of imidacloprid and thiamethoxam were used as seed treatments on soybeans.

Summary of the report? "This analysis provides evidence that U.S. soybean growers derive limited to no benefit from neonicotinoid seed treatments in most instances. Published data indicate that most usage of neonicotinoid seed treatments does not protect soybean yield any better than doing no pest control."

Something for producers to evaluate as they look at input costs for future crops.

Visit the Illinois Bulletin to read University of Illinois entomologist Dr. Mike Grays review of the EPA report.

http://bulletin.ipm.illinois.edu/?p=2820

 

 



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