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Corn Growth Stages and Postemergence Herbicides – Size IS Important

  • May 10, 2021
  • 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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Adjusting Nitrogen Fertilizer Rates to Price Changes

  • April 28, 2021
  • Emerson Nafziger

Corn planting progress continues, with 23% of the Illinois crop planted by April 25, and planting continues with some rain delays the last week of April. The warm temperatures that finally arrived will be good for emergence of both corn and soybeans, but there are some reports of damage to early-planted soybeans from frost on April 21 and 22.
Warmer soil temperatures will start the mineralization process by which microbes release N from soil organic matter,…

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Emerging Soybeans and Delayed PRE Herbicide Applications

  • April 26, 2021
  • Aaron Hager

Soil-residual herbicides are important components of integrated weed management programs. Labels of many single and multiple active ingredient products allow application before and after soybean emergence, but other active ingredients can cause severe soybean injury if applied to emerging soybean. In fields where a PRE herbicide application has been delayed and soybean are beginning to emerge, the following active ingredients (applied either alone or as a premix product) should not be applied:
sulfentrazone (many Authority-based products,…

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Soybean gall midge: learn to identify this potential invader

  • April 20, 2021
  • Nick Seiter

Authors: Nick Seiter1, Joseph Spencer2, and Kelly Estes2
1University of Illinois Dept. of Crop Sciences; 2Illinois Natural History Survey
Farmers in several states to our west (particularly in eastern Nebraska) have been dealing with the soybean gall midge for several years. We have been fortunate to avoid this new soybean pest so far in Illinois (a current distribution map, scouting instructions, and additional information are available at https://soybeangallmidge.org). We want to stay on top of soybean gall midge if it does arrive here,…

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A Tough Week Ahead

  • April 19, 2021
  • Emerson Nafziger

In the week ending on April 18, planted acreage moved up in Illinois, from 5 to 12% for corn and from 2 to 5% for soybean. The forecast for cool temperatures this week has turned even cooler, with highs in the 40s for several days, and with frost possible, including temperatures that may drop into the upper 20s in some places in mid-week. There may be some snow as well, which as it melts will move as cold water into the soil.…

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Cool Temperatures at Planting

  • April 16, 2021
  • Emerson Nafziger

Planting is off to a fast start in Illinois, with 5 percent of the corn crop and 3 percent of the soybean crop planted by April 11 (NASS). With the exception of much of western Illinois, where heavy rain fell on April 8-9, most of Illinois remains dry, and planting continues, but with some concern about low temperatures that persist.
Temperatures the first half of April were close to average, but were above average the first week and below average the second week of the month.…

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Does This Product Work?

  • April 6, 2021
  • Emerson Nafziger

“Every agronomic decision is a good one for someone” is a quote that I saw recently that reminds us that being “entrepreneurial” is high valued in today’s business world, rewarded in some cases by large amounts of venture capital invested in startup companies. That’s as true in crop agriculture as in any other business, and it means that startups are under pressure to find or create niches and product(s) to fill them, and to demonstrate that these products are widely sellable.…

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Planting-time Considerations

  • March 23, 2021
  • Emerson Nafziger

March rainfall in Illinois has ranged from as much as an inch below normal in the northern third of the state, to close to normal in central Illinois, to as much as 2 to 3 inches above normal in the southern third of Illinois. This, along with some rain this week, has dampened the hope for a March start to planting in most areas. That gives us time to think about issues related to planting and early-season management.…

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Additional Illinois-Specific Dicamba Restrictions for Applications in Soybean

  • February 23, 2021
  • Aaron Hager

The Illinois Department of Agriculture recently announced additional restrictions for dicamba applications to soybean. In addition to the requirements of the federally-approved labels, all use on soybean of pesticides containing dicamba in Illinois shall comply with the following requirements:
Temperature Restriction: A pesticide containing dicamba shall not be applied on soybean if the air temperature at the field at the time of application is over 85 degrees Fahrenheit or if the National Weather Service’s forecasted high temperature for the nearest available location for the day of application exceeds 85 degrees Fahrenheit.…

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Midwestern Hemp Database: 2020 Research Report

  • February 19, 2021
  • Phillip Alberti

The Midwestern Hemp Database (MHD) is a large scale collaboration between land grant institutions, private laboratories, non-profit organizations, and grower-cooperators in the Midwest. The goal of this project is to provide regional insight into agronomic performance and cannabinoid development of hemp cultivars grown for cannabinoid production. The data generated from this project is made available through the publicly accessible interface located at: go.illinois.edu/HempDatabase.
The database contains information on production practices (planting method, row spacing,…

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