Brake Use in Peanuts Peanut Notes No. 24 2023

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Brake controls many of the problematic weeds in peanuts. These include Palmer amaranth, common ragweed, and annual grasses. Here are some of the key things to remember about its use in peanuts.

  1. Brake requires significant and timely water for activation. There will be virtually no weed control if there is no rain or irrigation.
  2. The use rate is likely 12 oz/acre on most of our peanut soils. Based on research from years ago, I do not recall seeing significant damage to peanuts.
  3. Brake needs to be applied within 36 hours after planting. Do not apply Brake to emerged peanuts.
  4. Brake needs to be co-applied with another herbicide  – Group 15s or Valor are possible options.
  5. My recommendation as tank-mix partner is a Group 15 (Dual, etc.) as a PRE application. Valor plus Dual Magnum is a common treatment. The Dual Magnum brings grass control and suppression of other weeds to the table along with what Valor controls. Neither of these herbicides are standalone. If you mix Brake and Valor and rain does not occur, there will be a gap in the grass control that Brake provides. A mixture of Dual Magnum, Brake and Valor is very expensive and still needs water for activation for broad spectrum control.
  6. Having Brake as an option brings us a new MOA (Group 12). That is very important for us moving forward. We can see how Brake competes with Valor-based programs. But until we have more widespread PPO resistance, utility of Brake may be limited. However, in Virginia, ALS-resistant and PPO-resistant common ragweed is an issue. Brake has the potential to make important contributions in that setting. However, there is a lot of wheat that is grown for grain in that region of the state, with a significant amount planted after peanuts (see next bullet.)
  7. If you are growing wheat for grain production, do not use Brake in peanuts. There is an 8-month restriction on planting wheat after Brake. There are conversations about how digging peanuts may negate this issue. I would not rely on that to avoid injury to wheat.
  8. There is an 18-month rotation restriction for tobacco. There is not a restriction for corn, grain sorghum, cotton, sweetpotato, or soybeans planted the following season. Data are most likely limited for many of the vegetable crops grown in the central coastal plain of NC. Use caution in this respect if there are no available data on planting these crops after Brake. The Brake label states that peppers and tomatoes have an 18-month restriction. Crops like cucumbers and watermelons are not listed on the label.
  9. We plan to have research plots out this coming season to look at Brake programs compared with traditional programs. We will likely plant wheat after these treatments. However, it would take a lot of runs of an experiment and years to get a handle on the risk to wheat. The restriction on the label is the final word. If the registrant changes the label that is a different story.