Early reports from around Tennessee show early corn yields have been quite good.
Even some of my weedy checks in test plots are making 160 bushels per acre! However, I know there are many flooded out areas in fields that will lower the yield average and likely have stressed corn with small ears that will drop through the snap rollers.
Because of this, and with many folks intending to plant wheat behind this crop, volunteer corn will likely be a big problem this fall particularly in those areas.
Volunteer corn germinating in September can be a weedy mess that makes establishing a good wheat stand a challenge.
For the few fields planted to non-Roundup Ready corn hybrids, one can simply apply glyphosate to control the problem. That only entails a fraction of our acres, so what are some good options on volunteer Roundup Ready corn?
There are really two good options to control volunteer corn before wheat planting. Finesse at 0.5 ounces per acre tank-mixed with 32 ounces per acre of glyphosate is a very good option. It will provide good knock down and residual control of volunteer corn as well as most winter annual broadleaf weeds and establishing annual ryegrass.
Ryegrass control should be monitored closely after a Finesse application as ALS-resistant ryegrass has become more prevalent in recent years.
The other option is Gramoxone at 40 to 48 ounces per acre. Go with the higher Gramoxone rate when volunteer corn is over 10-inches tall.
A residual like Valor can be tank-mixed with the Gramoxone up to 30 days before wheat planting. The Valor should provide residual control on pigweed and winter annual broadleaves, but will likely let annual rye and Poa escape.
Another residual option before wheat planting to add with Gramoxone is Sharpen. Sharpen at 1 to 2 ounces per acre may be applied right up to wheat planting. Like Valor, it will provide some residual control of Palmer and winter annual broadleaf weeds, but will not help with annual ryegrass or Poa.