Recent Updates

17 Nov 2023

2023 County Standardized Trials-Soybean Data

17 Nov 2023
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This year’s soybean CST class consist of 61 varieties covering late 3’s to early 5’s maturity groups.  These trials are split by both maturity groups and herbicide tolerance, Late III, Early IV, Late IV, and Early V, and by Xtend and Enlist.  These trials were planted on-farm across the state in 63 county demonstration plots.

If you have questions about UT’s variety testing program, please contact your local county agent.

Thanks to all who contribute to these trials and your support to the program.

Click on the table below to enlarge data in pdf form.

Late III Xtend

Early IV Xtend

Late IV Xtend

Early V Xtend

Enlist

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06 Nov 2023

2023 County Standardized Trials-Corn

06 Nov 2023
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39 Corn Hybrids were evaluated in the 2023 CST program.  With the weather we had this summer, our yields are very strong with an overall average across all hybrids and locations over 210 bu/ac. With the many locations/replications in these trials, we can look at performance across many soil types and weather/climate conditions that you can use to help select high yielding, consistent hybrids to bring to your farm.  Contact your local county agent for more details or if you need a print out of this data.

These CST plots are large strip trials located ‘on-farm’ with a minimum of 300 feet in length.  Inputs and management decisions are on a by location basis and determined by the cooperating producers.  Three relative maturity groups divide the trials, Early Corn will be 113 day and earlier, Medium Corn will be 114-116 day, and Full Corn is 117 day plus.  Thank you to everyone involved in the CST program for your support and contributions: County Agents, UT Extension/Research, Growers, Industry, Retail.

Below are the results for our 3 RM groups.  Click on the table to open a PDF of these tables.  These results can also be accessed on https://search.utcrops.com/

Early Corn <114 day

Medium Corn 114-116 day

Full Corn >116 day

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27 Oct 2023

2023 Corn Grain OVT Prelim

27 Oct 2023
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Prelim results from the 2023 TN corn grain hybrid OVT are now available as an excel file 2023 Corn Grain Tables. Thirty-three hybrids were evaluated in small plot replicated trials (REC) at 9 sites. The CST trial data is still being finalized but should be posted within the next week and will be included in the final combined report to be posted here and on search.utcrops.com.

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25 Oct 2023

Boll opening before a Halloween freeze

25 Oct 2023
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While we’ve been steadily moving through harvesting our trials, I’ve been paying close attention to the night temperatures forecast for the three day stretch centered on Halloween.  Fortunately, there are only a few acres left that might require any more boll opener; I cannot recall a more productive year harvested in such a short timeframe.  Still, for those trying to prepare their latest planted acres for the picker, the time to make that final application of boll opener is NOW.   In this article, I briefly cover rates and products I would consider for applications going out today (10/25) or tomorrow (10/26).

Continue reading →

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17 Oct 2023

Multiple-Herbicide Resistant Waterhemp in Tennessee

17 Oct 2023
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Waterhemp that escaped multiple applications of Engenia + Glyphosate

Last year we reported on waterhemp in Montgomery and Macon counties that was resistant to dicamba.  We came to this conclusion from both research we conducted in the fields and the confirmation of those results by greenhouse research. The greenhouse research was conducted at Purdue University by my colleague Dr. Bill Johnson and his graduate student Claudia Bland. Continue reading →

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17 Oct 2023

Fall Application Ryegrass Control

17 Oct 2023
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Corn in a ryegrass field

Ryegrass has become a serous weed issue in some fields that past couple of years.  A major reason for this is that much of it is now glyphosate-resistant.  Even if clethodim is used rather than glyphosate often it is applied on ryegrass sometime in late March through April when the grass is too well established to provide consistent control. Continue reading →

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28 Sep 2023

EPA Herbicide Strategy Frame Work Will Impact All Pesticide Applications in Tennessee

28 Sep 2023
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In response to losing lawsuits on lack of action on the endangered species, the EPA proposed a draft strategy aimed at guarding federally endangered species against potential negative impacts of herbicide applications. They describe the strategy as a mix of population-level protections for over 900 listed species and designated critical habitats with a range of mitigation measures. What the EPA is proposing to do will eventually impact every pesticide application in Tennessee.

This is a very complicated topic.  I found the two WarAgainstWeeds podcasts helpful in trying to understand the “why, where and how” of EPAs strategy.

If you would like to comment to EPA on this plan (I would urge you to comment!), here is a link: Write a Comment

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21 Sep 2023

Cover Crop Variety Selection for the South

21 Sep 2023
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As harvest progresses for our major commodities, it is time to start planning and planting cover crops. Cover crops offer many benefits to agronomic systems, including erosion control, improvement to soil health, nutrient retention and additions, and weed suppression. How do we maximize these benefits? A key component is finding the right species, and varieties within those species. Just like corn, soybean, and cotton, that “right” variety is going to depend on your region and cropping system.

To help our growers find the best cover crop varieties for their region and system, we have been running a cover crop variety trial in Tennessee since 2019. We are excited to collaborate with the Southern Cover Crops Council this year to expand this trial and cover a 10-state region in the South. If you are in AL, AR, FL, GA, KY, NC, SC, TN, TX, or VA, we’ve got you covered! In this year’s report, you will find information important to maximizing those cover crop benefits, including cover crop biomass, canopy cover, and estimated nitrogen release, along with forage quality values for those who may be using cover crops for grazing (IVTDMD, CP, ADF, NDF, Lignin).

This past year was an odd one, with a cold snap in December that burst pipes across the South and was not so kind to some of our cover crop species. This does not reflect a typical year (at least I hope that isn’t our new normal!). For information on some of those more cold-sensitive species, looking at previous year’s reports may be helpful.

Southern Cover Crop Variety Trial 2023

Cover Crop Variety Trials in Tennessee Archives 2020 – 2022

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