Category Archives: Soybean

22 Aug 2019

Reports of Palmer Amaranth Escapes in Xtend Crops Continue to Mount

22 Aug 2019
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(Picture 2) Xtend soybeans wrapped Up with Palmer amaranth that escaped Engenia + Roundup PM + Warrant
(Picture 1) Shortened branch 2nd from right was original apical meristem…. It was 4″ tall and never re-grew after Engenia applicaton

I was thinking it might be 2021 or at least 2020 before we would start getting reports of Xtend soybean fields that were wrapped up with Palmer amaranth.  Wrong! It is 2019. I visited several soybean fields this week where, judging by the Palmer amaranth regrowth, Engenia had been applied to Palmer that was 2 to 6″ tall (Picture 1). A small percentage died and the rest went on to over run several Xtend soybean fields (Picture 2).  In another field a follow-up Engenia application was made and it did improve the pigweed control some but the field was still far from being a success story. Continue reading →

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01 Aug 2019

Insect Calls of the Week (August 1, 2019)

01 Aug 2019
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I don’t think I have had a call about soybean all week, but my observations suggest we need to be scouting for stink bugs in our earliest beans, and in some areas, kudzu bugs. Thus far, caterpillar infestations have been very light. As the bollworm flight increases, closely scout for corn earworm in Continue reading →

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26 Jul 2019

Field Days – Water Management and Sensor Demonstration for Soybean (Next Week)

26 Jul 2019
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A field tours of water management and sensor demonstrations in soybean are planned for nest week (see below).  Please navigate to the following page for more details about times, locations and registration information – https://ag.tennessee.edu/BESS/Pages/Sensor-Comparison.aspx.

  • July 30 – West TN Research and Education Center (field tour and in-service training)
  • August 1 – Weakley Co. (sensor demonstration)
  • August 2 – Fayette/Hardeman Co. (sensor demonstration)

 

 

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10 Jul 2019

Reminder – Soybean Scout School This Week (7/17) in Dyersburg

10 Jul 2019
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UT’s Soybean Scout Schools will be held in July (see below). These field-side programs cover the basics of soybean growth, scouting, pest identification, and general management. Pesticide recertification and CCA CEU points will be available. Scout Schools are offered free of charge with sponsorship from the Tennessee Soybean Promotion Board. Registration is not required. Participants will receive a scouting notebook and a sweep net while supplies last. Continue reading →

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09 Jul 2019

Control Options for Prickly Sida that has Escaped Engenia or XtendiMax and Glyphosate

09 Jul 2019
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Prickly Sida and Palmer amaranth escaping 22 oz of XtendiMax and 32 oz Roundup PM picture taken 28 DAA

There have been a good number of calls reporting poor prickly sida (teaweed) control with Engenia or XtendiMax tankmixed with Roundup PM.  I have seen prickly sida escape dicamba tankmixed with glyphosate in some research here at the station as well.   This appears to have been a building problem as I recall similar, though fewer, calls last year.  The lack of prickly sida control in the Xtend system has been building a seed bank that is apparently showing up in many fields this year. Continue reading →

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08 Jul 2019

New Tactics Needed in Managing Weeds in Xtend Crops

08 Jul 2019
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Palmer amaranth recovering 20 days after 12.8 oz Engenia and 32 oz Roundup PM

After more questions this past week on follow-up applications to remove Palmer amaranth, junglerice and goosegrass in Xtend crops it occurred to me we need a new thought process on weed management  with this technology. Roundup Ready soybeans came out in 1996 and cotton in 1998.  If we look back at the first three years with that technology, glyphosate was controlling every weed no matter the weed height. That Roundup Ready performance in the early years is still the expectation with Xtend technology. It has become abundantly clear, in year three, that Engenia or XtendiMax mixed with glyphosate is not providing even close to the level of weed control that glyphosate alone did back in it’s hay day.  Continue reading →

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