Category Archives: Weeds

Easing off the clutch: 2018 cotton planting

Author: Tyson Raper, Cotton & Small Grains Specialist Comments Off on Easing off the clutch: 2018 cotton planting

I’ve visited with several over the past few days who either started planting yesterday (4/30), who plan to begin today (5/1), or who will be planting by tomorrow (5/2).  While we have a few very early planting-date trials established here in Jackson, none of our large-plot trials have been planted and none of our small-plot work requiring normal planting dates have been planted either.  That will change for my program today (5/1). Continue reading

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Soybean Residual Herbicide Consideration

Author: Larry Steckel, Extension Weed Specialist Comments Off on Soybean Residual Herbicide Consideration

Residual herbicides will play a large role in the success or failure of our weed control program in 2018. Last year a number of folks used Engenia plus Roundup followed by Engenia plus Roundup as needed in soybean.  That will lead to failure if not in the short term certainly in the long term. Continue reading

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Late Burndown ahead of Cotton

Author: Larry Steckel, Extension Weed Specialist Comments Off on Late Burndown ahead of Cotton

With all the wet cold weather everyone has had to abandon their Plan A cotton burndown program. So what is the Plan B burndown plan with most wanting to plant cotton around May 1?  Continue reading

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Managing Late-Emerging Horseweed

Author: Larry Steckel, Extension Weed Specialist Comments Off on Managing Late-Emerging Horseweed

In 2017 and now again in 2018, the lack of horseweed (marestail) in many fields for late March is very notable.   So what is the reason/s for the lower landscape level horseweed infestations? Continue reading

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Getting Late Early for Burndown in Corn

Author: Larry Steckel, Extension Weed Specialist Comments Off on Getting Late Early for Burndown in Corn

It is getting late early with respect to burndown in Tennessee.  This is particularly true for corn acres where we are well behind the burndown pace of most Tennessee springs. Typically by late March we have a good bit of corn ground burned down and often have a few acres planted. The 10 day forecast calls for a good chance of rain 7 out of those 10 days.  Regardless of whether the forecast is accurate corn burndown and planting will have to occur fairly close together. Continue reading

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Palmer Amaranth Management Strategies in Xtend Soybean

Author: Larry Steckel, Extension Weed Specialist Comments Off on Palmer Amaranth Management Strategies in Xtend Soybean

As of Monday we have had well over 2400 folks take the dicamba training in Tennessee.  Our best estimate is that about 2500 total would be spraying Engenia or XtendiMax in Xtend crops so we are clearly in the short rows for getting applicators trained.  If you still lack the dicamba training, contact your county Extension Agent.

Since most are now trained to apply dicamba, questions have arisen on strategies to manage Palmer amaranth in Xtend soybean under two different situations. Continue reading

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Controlling Multiple-Resistant Palmer Amaranth

Author: Larry Steckel, Extension Weed Specialist Comments Off on Controlling Multiple-Resistant Palmer Amaranth

A survey sponsored by the Tennessee Soybean Promotion was conducted last summer to determine the percentage of fields that harbored PPO-resistant Palmer amaranth in West Tennessee. We found that 83% of the fields tested had Palmer amaranth infestations that survived a field use rate of Flexstar (fomesafen). Recent field research has shown that these populations are also ALS & glyphosate-resistant.

Additionally, some of these multiple-resistant Palmer amaranth populations are proving to be difficult to control with a number of herbicides.  So research was conducted to investigate the effectiveness of various herbicides in controlling PPO-resistant (Flexstar-resistant) Palmer amaranth compared to a location where PPO herbicides were still effective on Palmer.  Continue reading

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New Herbicide Options for Broadleaf Weed Control in Wheat

Author: Larry Steckel, Extension Weed Specialist Comments Off on New Herbicide Options for Broadleaf Weed Control in Wheat

Phone calls with questions on wheat weed control have started.  Some are asking how to control ALS-resistant (e.g., resistant to Harmony) chickweed.  ALS-resistant chickweed is clearly becoming more of a challenge to control in wheat across the state but particularly in middle Tennessee. Other folks have asked about cleaning up just a sundry of different broadleaf weeds like henbit.  Fortunately, there are two “new” herbicides that have been recently labeled in wheat that can help on these broadleaf weeds. Continue reading

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