All posts by Larry Steckel, Extension Weed Specialist

01 Aug 2022

New Data on Controlling XtendFlex Volunteer Soybean in XtendFlex Cotton

01 Aug 2022
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Volunteer XtendFlex Soybean in XtendFlex Cotton: 2022 Lauderdale County

What are some options to control volunteer XtendFlex soybeans in XtendFlex cotton fields?  As mentioned in an earlier blog both Envoke and Staple look to be potential answers to this new issue but without data it was difficult to say.  It was brought to my attention that Dr. Alan York, emeritus Professor at North Carolina State University, actually has some data on this problem. A study was conducted in North Carolina and Georgia in 2000 and 2001 with the objective of examining if Envoke, Staple or MSMA could control Roundup Ready volunteer soybean in Roundup Ready cotton. Continue reading →


23 Jul 2022

Weed Management Strategies Following Early Corn Harvest that will be Planted to Wheat

23 Jul 2022
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Burned up corn July 2022

The long hot and mostly dry June and July have driven a good bit of our corn crop to premature maturity.  Similar to the drought of 2012 when the corn crop burned up, I would expect a good bit of the prematurely matured corn will be harvested in August and early September.  In 2012 a good bit of that early harvested corn was planted to wheat well before the fly free date. I expect many will manage this disappointing corn crop similarly this fall. Continue reading →


10 Jul 2022

Auxin Herbicide Stewardship

10 Jul 2022
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This long, hot and mostly dry spell has made this growing season a real challenge. Hopefully, we will catch a break this week and can get some much-needed general rain across the state. Herbicide drift is even harder for crops to recover from when drought stressed so please remember to use best management practices applying all herbicides but particularly products that contain dicamba and 2,4-D. Continue reading →


03 Jul 2022

Weed Control During Drought Stress

03 Jul 2022
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Picture 1. Palmer amaranth and volunteer XtendFlex soybean in XtendFlex cotton

The forecast, unfortunately, would suggest we are in store for another hot and dry week.  That persistent weather pattern makes the challenging aspect of weed control more difficult which leads to questions. One common one is how long a residual herbicide will persist on the soil surface before a rain activates it?  Another common question during long stress periods is the poor weed control from a POST application due to resistance or dry weather. Continue reading →


27 Jun 2022

Management of Volunteer Xtendflex Soybeans in Xtendflex Cotton

27 Jun 2022
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What are some options to control volunteer XtendFlex soybeans in XtendFlex cotton fields?  This issue is something that we need to do research on as there is no data. As such in answering the question one has to rely exclusively on experience. Unfortunately, all the experience that I and my Midsouth colleagues have does not hint at a real good option to remove these volunteers. Continue reading →


27 Jun 2022

Post-Direct and Hooded Application Options for Cotton

27 Jun 2022
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Picture 1. Goosegrass escaping dicamba + glyphosate at burndown followed by dicamba + glyphosate early POST

Some of the earlier planted cotton fields will soon be entering the true “laying it by” application timing.  Given that some are clearly not successful spraying Palmer amaranth, goosegrass or junglerice with glyphosate + dicamba (Picture 1 and 2), going back to an “old school” layby is a good plan. Continue reading →


20 Jun 2022

Auxin Herbicide Resistant Palmer amaranth Management

20 Jun 2022
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Picture 1. Palmer amaranth escapes 18 days after application of XtendiMax /fb Clethodim. Research in Madison county

Getting reports from several consultants frustrated with the lack of Palmer amaranth control after applications of either Dicamba or Enlist One in cotton and soybean.  Indeed, in our second year of field research at locations where dicamba or 2,4-D provided sketchy pigweed control in 2021 we are seeing similar if not worse Palmer amaranth control in 2022 (Picture 1). Continue reading →


19 Jun 2022

Junglerice and Barnyardgrass Management in Soybean and Cotton

19 Jun 2022
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There have been several reports last week of multiple glyphosate and/or clethodim applications not controlling barnyardgrass or junglerice.  We really do not know the precise reasons for the lack of control in any given field but based on previous research and past experience there are a couple likely causes. Continue reading →