Published on Monday, April 10, 2017
As I write this, it’s raining outside. We are fortunate to receive rainfall because our soil moisture content was very low across much of the state, as we experienced very little water recharge this winter. However, with the blessing of soil moisture comes the frustration of having time to adequately prepare our ground for planting. In reduced and no-till systems, we rely on burndown chemical applications to clean our fields of weeds. The forecast indicates that we may experience rainfall at relatively consistent intervals in the near future. Frequent rainfall events, cooler temperatures, and poor drying conditions all make it difficult to get things done.
Additionally, the fall and winter conditions we experienced were mild, favoring tremendous growth of winter annual, and now, emerging summer annual weeds. Many fields going to corn and most fields going to soybeans have not had burndown chemistry applied due to saturated soil conditions and some of our fields are getting wooly! We may experience narrow windows to get both our planting and chemical application operations completed. With that said, I wanted to share a few thoughts with respect to burndown and pre-emergent weed control.
General Principles for Current Conditions
Lessons We Have Learned
Please note, Gramoxone, UAN, and metribuzin all have a tremendous “synergy” in the tank, meaning they work together well and enhance overall effectiveness of a burndown ahead of soybeans. Gramoxone, UAN and atrazine have the same synergy when applied ahead of corn. Increase the UAN rate and add some ammonium thiosulfate and you will have a nice burndown that will control resistant marestail and give you a pre-plant nitrogen starter ahead of corn or soybeans.
Mike Effertz, one of Beck’s local dealers located south of Kansas City, shared something with me that his late father said in one of their crop planning meetings years ago. While sitting at a conference table with attention spans waning as everyone wanted to be out in the field, his father Tom Effertz said, “if we get it wrong, we are going to get it wrong in here at this table. We are not going to get it wrong out there.” I love it! So make sure you plan to effectively control your weeds in less than ideal application conditions.
As always, feel free to contact your local seed advisor or field agronomist for help as you develop your burndown and residual weed control strategy.
Sharpen® is a registered trademark of BASF. Gramoxone® is a registered trademark of Syngenta. Liberty® is a registered trademark of Bayer.
Author: David Hughes
Categories: Field News
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