Category Archives: Cotton

Increasing a cotton seed’s chance of success in a wet spring

This has been a tough week, with many walking cotton planted in mid to late May to find stands thinner with more gaps than acres planted in April. The number of cotton acres within the state appears to be decreasing despite several growers still planting.  Subsequently, in the past few days, I’ve had calls complaining about seedling vigor of every commercial cultivar.  Unfortunately for us, seedling vigor and seed quality have almost nothing to do with the failed stands from our last planting window- even marble-sized seed of the highest quality will drown when forced to suffer through prolonged saturated conditions. That said, a few callers this week pointed to one cultural practice as the saving grace on their acres, with others mentioning their desire to incorporate the practice on some of their acres in the future. In this blog, I’ll describe the underlying reasons for why that practice may only fit a portion of our acres- but for the acres on which it fits, it rarely results in the need for a replant.  I’ll also talk briefly about the lessons those who cannot use the practice might apply to their acres.

The slider above includes two pictures of cotton planted by the same planter, on the same day (May 22, 2025), within the same field (Milan, TN)- the two areas are approximately 200 ft apart.  Click and hold your pointer over the dividing line and slide it back and forth to see the striking differences associated with bedded versus flat ground this year. Continue reading


What a May

Most of the conversations I’ve had in the past few days have centered around what to do with thin stands, when to stop planting, and how to manage late planted cotton.  In this post, I’m going to try to briefly tackle these three topics.  Be prepared, my opinion on a few of these items may run counter to the opinions of others.  Spoilers- if in doubt, keep it; yield potentials begin to decline rapidly as we move into June; and June cotton should be planted thinner than April or May cotton. Continue reading


Delayed Burndown: Strategy Burning Down Large Weeds

(Picture 1 ) 3 foot tall goosegrass, fall panicum and Palmer amaranth that need to be burndown before soybean planting
(Picture 2 ) Delayed burndown: Large Horseweed and Palmer amaranth

What began in March as a quick start to the planting season has with the many frequent rain events turned into a very slow struggle.  The question of the hour is on how to burndown fields that are grown up messes before planting soybeans (Picture 1 and 2).  There are strategies that can tackle fields that are heavily infested with 3’ tall goosegrass, Palmer amaranth, horseweed and volunteer corn.  They typically require some kind of sequential application to be successful.

Paraquat, the usual “go to” for late spring burndown, will not control grasses with size, horseweed or even pigweed that has gotten so far out of hand. As such, the best approach is aggressive tillage.  That unfortunately is not an option on our highly erodible fields.

In those cases, a tankmix of a high rate of Liberty plus clethodim is the best approach to try to control the grass weeds, horseweed and set the pigweed back.  Then, if possible, a couple days later apply paraquat.  This approach would have the best chance of success with herbicides.

In fields where the soybeans may emerge before a follow-up paraquat application could take place then Liberty tankmixed with Enlist should take out any escaped broadleaves.  If grass seems to be recovering then apply Liberty plus clethodim.


UT Cotton Scout School This Wednesday (May 21st)

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The UT Cotton Scout School is scheduled for Wednesday, May 21st, at the West Tennessee Research and Education Center (605 Airways Blvd, Jackson). There is no fee, and preregistration is not required. Registration begins at 8:00 AM with the program starting at 8:30. Pesticide points in categories 1, 4, 10 and 12 will be offered and a BBQ lunch will be provided. Content will include classroom and hands-on training with an optional go-to-the-field session after lunch. Topics covered will include cotton development and identification and symptoms of insect pests, plant diseases, and weeds.


Step two of the cotton ‘cost-cutting challenge’

Many in the area are just now in the thick of planting.  For those who have not yet put seed in the ground, please check my post from last week on seeding rate.  For those that were able to capitalize on our April window, you’ve already properly selected seeding rate and now you are looking at possibly a thrips spray or your first post application for weeds.  As normal, your crop looks ‘sickly’, having fought through a blackberry winter, cloudy conditions, and in some areas, additional rains that were not needed.  The second step of moving our cotton budget out of the red and into the black is recognizing inputs which provide a return on investment and those that do not.  Spoiler- most of the products that attempt to hitch a ride in the tank with your early season insect or weed control products often don’t pay for themselves.  In this post, I cover a few of the inputs we have evaluated to help you understand where not to invest.  Special thanks to Dr. Bradley Wilson and Dr. Brian Pieralisi for their contributions to this article.

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Burndown Timing is Critical for Ryegrass Control

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Italian ryegrass is still a significant problem in many Tennessee fields due to failed herbicide burndown applications.

Our recent research suggests that there are two critical factors in burning down ryegrass. First, timing of herbicide application is extremely critical to gain the most consistent ryegrass control.  The second is herbicide choice.

Timing is a very important component in ryegrass control.  Our recent research has shown that burndown applications applied in early February provide better control than the same application in March and is worlds better than applications in April (Picture 1.)

In general, clethodim is the most consistent choice to control this weed.  Glyphosate at best will only provide ryegrass suppression.  The tankmix of the two often will enhance the consistency of ryegrass control.

There have been calls this spring about ryegrass that has escaped multiple clethodim applications.  The concern of course is that resistance has developed as it has in Louisiana and Mississippi.  We plan to conduct a survey this year to determine if resistance to clethodim is present in Tennessee ryegrass.


Still Seeing Good Control with Liberty on Palmer amaranth

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Picture 1. Good Palmer amaranth control 7 days after application on Lauderdale county populations

Results from our greenhouse screens of Palmer amaranth to Liberty have been very encouraging.  We feared that the Liberty resistance documented in Arkansas had crossed the river.  The good news is that we have seen good control with a 32 oz/A rate of Liberty on all the Palmer populations tested (Picture 1). Continue reading


Step one of the cotton ‘cost-cutting challenge’

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I started planting trials looking at seed treatments and seed quality April 16th.  While I don’t think that is necessarily a wise decision for those NOT trying to stress their cotton, I had plants emerged by the 23rd of April and most treatments are quite healthy.  Many in the area started last week.  While my team paused planting for a week after the 16th,  we began planting as much as we could last week and at the moment we have planted our early Official Variety Trial in Jackson (April 23rd), our Ridgely Official Variety Trial (April 28th), our Gift Official Variety Trial (April 29th), and our Grand Junction Official Variety Trial (May 6th).  As I write this, we are working on planting several other trials here in Jackson.  Still, Tennessee’s cotton acres are well-under halfway planted.  In this blog, I highlight a few last minute decisions that you can make to help make your crop more profitable in 2025.

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