Influence of Close-Interval Sequential Herbicide Applications on Palmer Amaranth Control and Peanut Yield

These data indicate that control of 4-6" Palmer amaranth can be achieved with close­interval sequential applications of PPO herbicides. Additionally, the peanuts appear to be tolerant to these two applications recovery from foliar injury was rapid and yield was not reduced. However, there are still many unknowns to this approach. 1. How long can we wait between sequential applications? Will waiting 10 days between applications provide better or worse control? 2. How large can Palmer amaranth become before this strategy isn't effective? Currently, we have tested 4-6" weeds and found excellent results. However, if weeds are 6-8" or 8-10", it is unknown if these trends will continue to be observed.