cropCENTRAL | Field Crop Production Resources

I used a seed treatment. Why did I get seedling disease?

  • June 15, 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. 
After the recent deluge that moved through parts of the state, some Illinois soybean producers have been hit hard with seedling diseases.  A common question many people are asking is, “I used a seed treatment, so why am I having problems with seedling diseases?”
Seed treatments are popular in soybean production systems. …

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Crop conditions and potential in mid-June

  • June 14, 2018

  • Emerson Nafziger

Warm temperatures continue in Illinois, with growing degree day (GDD) accumulations since May 1 running from 150 above average in northern Illinois to about 250 GDD above average in the rest of the state. With GDD accumulations of 900 to 1,000 since May 1, the corn crop planted in early May is at V10 to V14, about 30 to 60 inches tall, and needing only about 350 to 450 more GDD to tassel and silking. With daily accumulations at about 25 GDD,…

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Reminder…University of Illinois Weed Science Field Research Tour

  • June 11, 2018

  • Aaron Hager

We would like to take this opportunity to once again extend the invitation to attend the 2018 University of Illinois Weed Science Field Day, to be held Wednesday, June 27th at the University of Illinois Crop Sciences Research and Education Center, located immediately south of the main campus on South Wright Street.  Coffee and refreshments will be available under the shade trees near the Seed House beginning at 8:00 a.m.  The tour will provide ample opportunity to look at research plots and interact with weed science faculty,…

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Try togetherness: Study promotes cooperative weed management to curb herbicide resistance

  • June 6, 2018

  • Aaron Hager

The following article was written by Lauren Quinn, media specialist in the College of Agricultural, Consumer and Environmental Sciences at the University of Illinois.  The article describes recently publiched research, lead by Dr. Adam Davis, a research ecologist with USDA-ARS and adjunct professor in the Department of Crop Sciences, that examined cooperative weed management as a tool used against the challenges of herbicide-resistant waterhemp.  The following quote from Dr. Davis succinctly summarizes the research: “The crux of the story is that if you do good stuff and you aggregate it at larger spatial scales,…

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Residual Soybean Herbicides Applied Postemergence

  • June 5, 2018

  • Aaron Hager

Soil-residual herbicides are important components of integrated weed management programs.  Reducing the number of weeds exposed to foliar-applied herbicides helps reduce the selection intensity for weeds resistant to foliar-applied herbicides.  Residual herbicides applied with postemergence soybean herbicides also can reduce the need for a second postemergence application.  However, simply applying a soil-residual herbicide does not guarantee the product will provide the desired level or duration of weed control.  Many edaphic and environmental factors influence the level of weed control achieved by soil-residual herbicides.…

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Soybean Cyst Nematode: Race Shifts and Grass Cover Crops as a Potential Alternative Control

  • June 4, 2018

  • Talon Becker

Authors: Talon Becker and Nathan Kleczewski
Among the various soybean pests, Heterodera glycines Ichinohe, known by most as soybean cyst nematode (SCN), continues to be a persistent cause of yield loss for soybean producers1.  SCN has been found in every county in Illinois, as well as much of the eastern United States, Puerto Rico, and parts of Hawaii and Canada2 (Figure 1).
Figure 1.

Map of the known distribution of the soybean cyst nematode,…

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Seedling diseases of soybeans

  • June 1, 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 have started to emerge, and as you may expect, this is a prime time to scout fields for early season seedling diseases.  Seedling diseases are caused primarily by fungi or fungal like organisms that , under the correct conditions (moisture, temperature, susceptible variety) can colonize the seed or germinating seedling and cause the seedling to die before it reaches the soil surface,…

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Seedling Diseases in Soybeans – Time to Scout!

  • June 1, 2018

  • Nathan Kleczewski

Now is the time that seedling diseases of soybeans will start to be apparent.  Indeed, we have started to see more images of soybeans that may have symptoms of seedling disease.  However, it is important to understand that seedling diseases are complex, and a simple picture often is not sufficient to adequately diagnose the issue.  I wrote a more extensive of seedling diseases of soybean on the Illinois Field Crop Disease Blog, which can be accessed here…

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Western Corn Rootworm: Adult Sampling and Economic Thresholds

  • May 30, 2018

  • Nick Seiter

Authors: Nick Seiter, Joe Spencer, and Kelly Estes
Based on degree day accumulations, western corn rootworm egg hatch should be underway in much of Illinois (roughly south of Peoria as of May 29; you can view your specific location using the degree day calculator here: https://www.isws.illinois.edu/warm/pestdata/sqlchoose1.asp). We are probably just over a month away from seeing the emergence of the first adult beetles. With low rootworm populations for the last several years, there has been a renewed interest in adult sampling.…

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Corn Growth Stage and Postemergence Herbicides

  • May 30, 2018

  • Aaron Hager

The labels of most postemergence corn herbicides allow applications at various crop growth stages, but almost all product labels indicate a maximum growth stage beyond which broadcast applications should not be made, and a few even a state minimum growth stage before which applications should not be made.  These growth stages are usually indicated as a particular plant height or leaf stage; sometimes both of these are listed.  For product labels that indicate a specific corn height and growth state,…

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