Cotton: 8 Key Points If Valor Is In Your 2020 Plan

Photo: ©2017 Debra L. Ferguson

Photo: ©2017 Debra L. Ferguson

It is the time of the year that row crop growers are spraying burndown treatments and preparing fields for planting. The following are eight recommendations regarding the use of Valor.

#1. Pay attention to the mixing sequence and tank partners.

For those using the old liquid formation of Valor EZ, please be careful with the tank mixing sequence and the choices of tank mix partners. Add Valor EZ to the tank first, then Roundup, Gramoxone or any water soluble herbicides such as 2,4-D and dicamba.

DO NOT flip this sequence. It will cause an incompatible tank mix! Also, do not mix EC or granular (dry flowable, water dispersible granules, etc.) herbicide formulations (products such as Prowl, Sonalan, Dual Magnum or Warrant) with Valor EZ – this will create incompatibility problems, too.

#2. With EZ 2, cleaning is still recommended.

As soon as the ag distribution system runs out of the old liquid EZ formulation, Valent will move exclusively to a new formulation Valor EZ 2 and will not produce any of the former (old) EZ product. Granular formulations may still be available for purchase.

Valor EZ 2 is more user-friendly and does not have the tank incompatibility issues like the original EZ. Sprayer cleaning does not differ between Valor EZ or EZ 2. Valor cleaning agent is still recommended for all current formulations. 

#3. Pay attention to granular rates.

Use rates of 1 fl oz of Valor EZ or EZ 2 = 1 oz of Valor SX granular in terms of active ingredient. If you spray 2 oz Valor SX per acre, you should use 2 fl oz of Valor EZ or EZ 2 per acre, etc. In most of cases, 2 oz of Valor with 32 oz of Roundup PM provides good to excellent control of winter weeds and provides residual control prior to planting.

#4. What to avoid.

Valor works great in conventional, cover crop/reduced tillage, and no-till fields. Valor plus Prowl H2O has been a great burndown treatment in conventionally tilled fields before cotton or peanut planting.

However, yellow herbicides (WSSA Group 3, dinitroaniline) generally have high binding affinity to organic matter, and therefore are not recommended for fields fully covered by cover crops or heavy cover crop residues.

#5. Terminate cover crops in proper sequence.

The recommended order of termination in high residue cover crop fields is first to spray covers with Roundup or Roundup + auxin herbicides, then roll down cereal rye or oats, and finally to apply Valor or Valor plus Warrant.

#6. Take caution with higher rates.

The addition of 3 oz of Valor in burndown applications exceeds the label rate, but it obviously extends residual control of pigweed (greater than 4 weeks frequently) and other broadleaf weeds.

  • If this rate is used, wait at least 3 weeks before planting – 4 weeks is better — with a minimum of 1 inch of rainfall.
  • We cannot recommend 3 oz since the current AL 24C label does not support that rate. (I am in the process of requesting this change in the rate based on soil type.) For a 2 oz Valor application, I see little problem with a 21-day plant-back interval in conventionally tilled fields that receive a minimum 1 inch rainfall or irrigation.
  • A 14-day plant back interval should be sufficient for cover crop fields that are strip-tilled before planting. Spray Valor, strip-till, then plant. A total of 4 oz of Valor is the maximum rate per acre per year.

#7. Remember what Valor doesn’t control.

Valor does not provide sufficient control of marestail (horseweed). Sharpen at 1 oz/A is still the best option. A few oz of dicamba may enhance large marestail control. If marestail survives burndown treatments, Gramoxone or Liberty is needed behind the planter.

#8. Avoid stand loss, seedling stunting.

Valor, Sharpen, and Reflex are in the same herbicide family (Group 14, PPO inhibitors), and they have potential to injure cotton. If you did not wait long enough to let Valor or Sharpen dissipate after preplant applications and then spray too much Reflex behind the planter, cotton stand loss and seedling stunting can occur, especially if greater than 1 inch of rainfall occurs before ground cracking!!!   

If you have any specific question, please give me a call or text me at 334-707-7370.   (Li)

Dicamba Traning Certificates

We are in the process of mailing dicamba training certificates for those who attended ACES auxin training. The current situation with coronavirus has slowed this process, and I apologize for the inconvenience.

If you do not receive your certificate by April 15, please call or text me. I will make sure you get one before cotton and soybean planting fully starts.