All posts by Larry Steckel, Extension Weed Specialist

25 Mar 2019

Late Burndown in Corn

25 Mar 2019
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Sprayers are rolling across Tennessee. Most are trying to catch up as we are well behind the burndown pace of many Tennessee springs. Typically by late March we have a good bit of corn ground burned down and often have a few acres planted. The current 10 day forecast calls for a good chance of rain just 2 days out of those 10.  Regardless of whether the forecast is accurate or not, corn burndown and planting will have to occur fairly close together. Continue reading →


18 Mar 2019

Clethodim and Managing Glyphosate-Resistant Grasses

18 Mar 2019
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Clethodim is quickly replacing glyphosate as the “go-to” herbicide for grass control in West Tennessee.  It began a few years ago as folks found that ryegrass and poa in many fields could no longer be controlled with glyphosate.  In more recent years the pace has accelerated as the spread of glyphosate-resistant (GR) summer grasses like goosegrass, jungle rice and Johnsongrass have made it necessary to add clethodim to glyphosate to “prop up” the grass control. Continue reading →


28 Feb 2019

Late Winter Weed Control in Wheat

28 Feb 2019
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There have been quite a few phone calls recently with questions on wheat weed control.  A big difference from previous years’ late winter calls on wheat is that no crop inputs have been able to be applied due to all the wet weather. As such many wheat fields have well established weeds. Continue reading →


10 Jan 2019

Enlist Soybean Gains China Approval: Some Thoughts

10 Jan 2019
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The news this week was the China approval of Enlist E3 soybeans (soybeans tolerant to glufosinate, glyphosate and 2,4-D) for import.  China also approved the import of Syngenta’s MGI soybeans.  Those soybeans are tolerant to Callisto, glufosinate and Balance herbicides. My understanding is this MGI trait in soybeans still needs EU approval so unlike the Enlist E3 soybeans they will not be offered for sale this year. Continue reading →


01 Nov 2018

Roundup Ready Soybean Response to Dicamba Exposure

01 Nov 2018
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The most recent inquires have been on what is the likely yield loss from dicamba drift to non-Xtend soybeans? These have come from fields that showed dicamba drift injury to the soybeans this summer and now are staying green delaying harvest this fall.

These questions have been frequent the last few years.  Research funded by the United Soybean Board was conducted in the Mid-south and Midwest this summer to help answer the question. Continue reading →