There is a difference between residual activity and soil activity. Residual herbicides typically suppress weeds from germinating for four to five weeks. Examples include: Authority®, Valor®, Fierce®, and Zidua®. Products that have soil activity can suppress weeds for 7 to 14 days but will not have enough activity to prevent future flushes of weeds later in the season. Engenia® and XtendiMax® can suppress the germination of small-seeded broadleaf weeds such as waterhemp, but we must pair Engenia and XtendiMax to achieve satisfactory weed control.
Categories: Agronomy, Agronomy Talk
Tags: Agronomy, Herbicide, Dicamba, soil, weed management