What is in this article?:
- New herbicide technology should help in resistant pigweed, marestail battle
- Work better during wet springs
• The auxin herbicide (dicamba, 2,4-D) tolerant traits in soybeans will likely become available to at least a limited extent next year.
Work better during wet springs
However, most other pre applied herbicides we utilize today do work better in wet springs. So in the new dicamba-tolerant soybeans utilizing a tank-mix of dicamba plus say a Valor or Dual or Warrant or even the new Zidua applied pre-plant or pre-emergence should provide much more consistent residual control of Palmer amaranth than what we can do today on our dryland acres.
Of course, dicamba can be sprayed over-the-top of dicamba tolerant soybeans.
However, there will be fields or environments where dicamba should not be sprayed postemergence due to off-target concerns and a traditional PPO herbicide like Flexstar or Cobra could be used instead.
These conventional herbicides should work better just because the pre will have worked. Moreover, dicamba utilized this early will minimize off-target movement concerns because sensitive crops are less likely to be present.
I really feel the dicamba-tolerant soybean system could look very similar to what we do today in Tennessee where most acres receive dicamba 30 to 14 days before planting.
It will be a little different in that the rates will be higher and can be applied closer to planting than what we can safely do today.
Moreover, we will have the flexibility to utilize dicamba in-crop but traditional herbicides we are currently using in-crop like the fomesafen-based products (Flexstar, Prefix) or Cobra should work well in this system too.
In my mind, one of the most intriguing aspects of this new technology is what herbicides like dicamba can bring to the table from a residual point of view. I feel it will be a key in best utilizing this new technology.