cropCENTRAL | Field Crop Production Resources

Tar Spot in corn- requesting your help

  • August 24, 2018

  • Nathan Kleczewski

Tar spot is a relatively new disease in corn.  It was first described in Illinois and Indiana in 2015, and was first located near DeKalb.  Tar spot has been detected to some degree in Northern Illinois each year since.  However, typically infections are sparse and the disease does not come in until later in the season.  Consequently, yield loss due to this disease has been minimal, and the disease mostly considered an oddity.
However, in parts of Latin America,…

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Physoderma Brown Spot and Node Rot in Corn

  • August 10, 2018

  • Chelsea Harbach

The following is posted on behalf of Dr. Nathan Kleczewski, Field Crops Pathologist for Growmark. This content is from the Field Crop Disease Hub webpage Dr. Kleczewski curated. 
Those of you who follow me on Twitter (@ILplantdoc) likely noticed numerous photos that I posted earlier in the season of Physoderma brown spot and node rot (PBS) on corn.  Over the last week, I have had several calls about this disease, and reports indicate it was more prevalent than usual,…

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Physoderma reports on the increase in the region

  • August 10, 2018

  • Nathan Kleczewski

Physoderma brown spot and node rot is a disease that has been increasing in incidence in the Midwest over the past 5-10 years.  We observed this disease frequently during scouting trips throughout the state conducted in late July.  Recently, we have been receiving more reports of this disease and questions pertaining to it’s impact on the crop and management.  I recently wrote an article on this disease and management recommendations on the Illinois Field Crop Disease Blog. …

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Spray Decisions for Frogeye Leaf Spot in Soybeans

  • July 27, 2018

  • Chelsea Harbach

The following is posted on behalf of Dr. Nathan Kleczewski, Field Crops Pathologist for Growmark. This content is from the Field Crop Disease Hub webpage Dr. Kleczewski curated. 
Soybeans throughout the state are maturing and consequently, many people have been asking questions about the need to make a fungicide application for suppressing frogeye leaf spot (FLS) in soybeans.
Frogeye leaf spot is caused by the fungal pathogen Cercospora sojina.  The pathogen can survive and overwinter in infested soybean residue for 2+ years,…

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Spray Decisions for Frogeye Leaf Spot on Soybeans

  • July 27, 2018

  • Nathan Kleczewski

Many people have asked about the need to make a fungicide application for frogeye leaf spot on soybeans this season.  I have posted a new article on the Illinois Field Crop Disease Blog which reviews this pathogen, how it works, and some new tools that may help you with these important decisions.  Find the article by clicking here.…

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Is the 2018 soybean crop as good as it looks?

  • July 24, 2018

  • Emerson Nafziger

If the appearance of the soybean crop going into late July predicts how it will yield, the 2018 crop in Illinois is going to be a high-yielding one. The crop in Illinois was rated at 78% good + excellent (G+E) as of July 22. Conditions across the US soybean growing regions are somewhat variable, but the 2018 crop is in good condition overall.
As I did with corn in the Bulletin on July 6,…

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Corn disease updates

  • July 19, 2018

  • Nathan Kleczewski

This week there has been a slight uptick in the amount of foliar disease reports in corn, likely as many people are actively scouting prior to making a fungicide application decision.  The most common disease, as you may expect is Grey leaf spot.  This disease is present to varying degrees in most fields.  No big surprise there.
We have seen and received several reports and samples of Diplodia leaf streak.  This disease can be caused by two different species of Diplodia,…

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Managing Japanese Beetles in Corn and Soybean

  • July 19, 2018

  • Nick Seiter

It is proving to be a big year for Japanese beetles in Illinois, and while populations should be starting to decline in much of the state, there is still a lot of feeding going on. The damage these insects cause can be eye-catching, especially on the edges of fields where Japanese beetles tend to congregate; however, before you decide to put out an insecticide, you want to be sure that decision is justified by the economics of the system.…

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Ewing Demonstration Center Celebrates 50 years of Continuous No-till Research at Agronomy Field Day on July 26

  • July 12, 2018

  • Nathan Johanning

The University of Illinois Extension will host the Ewing Demonstration Center Agronomy Field Day on Thursday, July 26, 2018 at 9 a.m.  Every growing season presents challenges to production, and this year is no exception!  We are happy to host this summer field day to share with local growers current, ongoing agronomy research in southern Illinois, including cover crop trials on corn and soybeans, nitrogen management in corn, weed management in soybean, and our continuous no-till field,…

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The 2018 Illinois Corn Crop at Mid-Season

  • July 6, 2018

  • Emerson Nafziger

The crop progress report from NASS showed that on July 1, 40 percent of the Illinois corn crop was silking, the crop rating was 85 percent good + excellent (G + E), and more than 85 percent of Illinois was reported as having adequate or surplus soil moisture. While this combination is very supportive of prospects for high yields, questions remain about whether the crop is actually as good as it looks, and about how dry weather in the coming weeks might affect crop prospects.…

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