cropCENTRAL | Field Crop Production Resources

Dectes Stem Borer and Lodged Soybeans

  • November 28, 2018

  • Nick Seiter

Many soybean growers have had problems with lodging at harvest this year. The primary culprit for this (as for many of our woes this fall) was the extended period of unfavorable weather that we have suffered. However, in parts of southern Illinois damage by the dectes stem borer contributed to this problem.
The adult dectes stem borer (Figure 1) is a “long-horned” beetle that can often be found in soybean and on other plants. The adult female chews a hole into the surface of the plant (usually at the petiole),…

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Too wet or cold to sample for SCN?

  • November 18, 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. 
Soybean Cyst Nematode is an extremely important, yield-limiting pathogen of soybeans in Illinois, reducing yields an average of 1-3% across the state.  As I have written in earlier posts, sampling your fields every 3-5 years to assess SCN levels and HG types is the first step in managing this issue. …

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Precautions for Dicamba use in Xtend Soybean

  • November 13, 2018

  • Aaron Hager

The extension weed science programs at The Ohio State University, Purdue University, and the University of Illinois recently collaborated to revise suggestions and precautions for use of dicamba in dicamba-resistant soybean.  The United States Environmental Protection Agency renewed labels of Xtendimax, Engenia, and FeXapan last October, and this updated extension weed science publication offers additional suggestions to help further reduce off-target dicamba movement.
Dicamba Precautions_2018 Update…

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  • November 11, 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. 
Charcoal rot is a disease that we see in years where soybeans are stressed for a significant portion of the season due to drought.  If you look at older references and publications in the field of soybean pathology, you will see that many show images of microsclerotia,…

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Too wet to sample for SCN?

  • November 8, 2018

  • Nathan Kleczewski

Soybean Cyst Nematode is an extremely important, yield limiting pathogen of soybeans in Illinois, reducing yields an average of 1-3% across the state.  As I have written in earlier posts, sampling your fields every 3-5 years to assess SCN levels and HG types is the first step in managing this issue.  The best time to sample for SCN is after harvest in the Fall, and this can easily be added onto any samples you gather for soil nutrient testing. …

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Late season stem discoloration in senesced soybeans- what caused it?

  • November 2, 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. 
The harvest in 2018 has been marred by frequent rains that resulted in soybeans in portions of the state being left out longer than desired.  As expected, more attention to these unharvested beans resulted in more observations.  One common observation was the presence of various types of black growth on stems of senesced plants,…

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Notes on fall fertilization

  • October 26, 2018

  • Emerson Nafziger

With harvest winding down in most of Illinois after another year with high to very high yields, it’s time to review some basics of fall fertilization. Neither fertilizer nor grain prices are historically high, so there’s reason to be aware of costs while making sure to cover the nutrient basics.
Nitrogen
In a webinar on October 19 organized by the Illinois Fertilizer & Chemical Association, we looked at some of the nitrogen response data that have come in so far this fall and considered what this might mean in terms of fall N management.…

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Tar Spot on Corn: Setting the Record Straight

  • September 28, 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. 
As we finish our corn harvest in 2018, we have noticed an increasing amount of information pertaining to tar spot circulating through the agronomic community that is not entirely correct.  Let’s take a minute to clarify some of the more commonly encountered rumors and set the record straight.…

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Setting the record straight on Tar Spot

  • September 27, 2018

  • Nathan Kleczewski

Remember that game of telephone we played as kids?  One person says something in to the ear of another and after passing through 10 people or so the starting message, “I like peanut butter” ends up as, “John licks turtles.”  Sometimes that can happen with information pertaining to plant diseases.  Lately there have been some interesting things said about tar spot on corn in the community.  To help clarify, and set the record straight, I published an article on my blog,…

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