| Abstrakt: |
Reviton® (tiafenacil) is a new protoporphyrinogen oxidase (PPO)-inhibiting herbicide labeled for burndown applications. However, as burndown applications can be stretched across a wide range of dates in the mid-South, there is an increased potential for off-target movement onto emerged crops. As a result, research was needed to determine the effects of simulated drift rates of Reviton on soybean [Glycine max (L.) Merr.]. In 2022, an experiment was established in Newport, Ark., St. Joseph, La., Alexandria, La., and Milan, Tenn., to assess the tolerance of soybean to simulated drift rates of Reviton herbicide when exposed at the V2 soybean growth stage. Reviton simulated drift rates of 1/8, 1/16, 1/32, 1/64, 1/128, and 1/256 of the labeled rate (1 fl oz./ac) were applied to determine the potential consequences of off-target movement. The higher simulated drift rates of Reviton (1/8x and 1/16x) caused greater visual injury (greater than 60% 2 weeks after application), height reduction (approximately 36% reduction 4 weeks after application), and yield reduction (55% and 26% reduction for the 1/8x and 1/16x rates, respectively) compared to other rates. These results suggest soybean growers should be concerned about Reviton drift onto their soybean crop, and appropriate measures should be taken to reduce off-target movement of Reviton to avoid soybean growth and yield reductions. [ABSTRACT FROM AUTHOR] |
