Potential Herbicide Carryover Needs to be Considered before Planting Wheat. It was not uncommon last year for fomesafen (Flexstar, Rhythm, Dawn, Prefix and Reflex) applications in mid-summer to carry in and injure wheat. According to the label, four months must pass between a fomesafen  application and planting wheat this fall. The highest probability of carryover is in fields that have seen little rain this summer. This is another ramification of managing glyphosate resistant Palmer amaranth. 

Volunteer Roundup Ready Corn Management. There have been several calls about burning down volunteer Roundup Ready corn before wheat planting. In our research there have only been two herbicide applications that controlled the volunteer corn. One was 40- 48 oz/A of Gramoxone Inteon applied with 0.25% NIS at 15 gal/A. Coverage and rate are critical to make this work. The other option was to use 0.5 oz/A of Finesse which also did a good job plus it provides residual control of ryegrass and many broadleaf weeds. Finesse has been used in Tennessee for about three years now and has for the most part worked well. Of course, like all pres, it works best when it receives a rain 7 to 10 days after application to activate it. However, if it does not get an activating rain the weed control can be inconsistent. One thing to remember is if Finesse is used, only STS soybeans can be planted for double crop in the summer. 

Bluegrass Control in Wheat. Continue reading →