cropCENTRAL | Field Crop Production Resources

Despite local Bt resistance, growers still have options

  • January 18, 2019

  • Joe Spencer

The development of resistance to Bt Cry toxins by the western corn rootworm is a growing concern, highlighted by the recent confirmation of field-evolved resistance to Cry34/35Ab1 in Iowa (https://www.agriculture.com/crops/corn/why-managing-corn-rootworm-just-became-more-complicated). Across the Corn Belt there are western corn rootworm populations with resistance to multiple Bt Cry toxins expressed in Bt corn. In Illinois, Bt resistance can be found in western corn rootworms from both continuous and first-year cornfields; rotation-resistant populations are vulnerable to Bt resistance.…

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2018 Applied Research Book now available

  • December 25, 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. 
Kelly Estes, Nicholas Seiter, and I will be compiling an annual report detailing the applied research trials and data that are available to share with the public.  These reports will be permanently housed on this website along with new factsheets and reports in Spring, 2019.
Data included in these unbiased research trials are for informational purposes only.…

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Dicamba Buffers, Training and Licensing: What to Know for 2019

  • December 17, 2018

  • Aaron Hager

The United States Environmental Protection Agency (EPA) renewed the labels of three dicamba-containing products used in dicamba-resistant soybean varieties on October 31, 2018.  These renewed labels also contain new restrictions and requirements that did not appear on the original labels.  Each application must completely satisfy all label requirements and restrictions, but the following three new requirements might necessitate additional forethought and planning.
Additional in-field buffers
Fields that exist in counties that might harbor endangered terrestrial dicot plant species must have an in-field,…

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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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