Aiming for a quick plant-back after burndown? Read your labels!
The weather has farmers and applicators worried about quick plant-back windows for burndown. In some cases, they are making changes to burndown and pre-tank mixes to be able to get into the field immediately.
2,4-D has a 7-day plant-back restriction for corn and 14-day plant-back restriction for soybeans, but maybe you are considering dropping the 2,4-D to get into the field faster. There is some confusion around using Sharpen (saflufenacil) as a replacement for 2,4-D to allow immediate planting. There is no plant-back restriction for corn following a 2 oz/ac Sharpen application. There is also no plant-back restriction for soybeans with a 1 oz/ac Sharpen only application on fine soils with good organic matter. However, plant-back restrictions exist for low organic matter and higher rates of Sharpen. In addition, if Sharpen is tank mixed with another Group 14 herbicide, like Antares, Authority or Valor, there is a 14-30 day restriction on soybeans depending on your soil characteristics. Therefore, if you are including a Group 14 residual in the tank mix, which is a good idea for resistance management, there is no time advantage for using Sharpen in place of 2,4-D.
Take home message – READ YOUR LABELS.
Recommendation for a quick plant-back herbicide burndown program with residual in beans:
Gramoxone (or glufosinate Liberty) + Omni Metribuzin + Sulfentrazone-Chloransulam (Antares Prime)
Always read and follow label directions. All product names, trademarks and registered trademarks are property of their respective owners.