Understanting herbicide resistance
The single most important component of a management strategy to avoid evolution of herbicide resistance is the rotation of herbicides having different mechanisms of action.
Tank mixes or sequential applications of herbicides having different mechanisms of action are often touted as components of a resistance management strategy. If the components of the tank mix or sequential applications are chosen wisely, this strategy can be very helpful in delaying resistance evolution. Unfortunately, many of the requirements of tank mix or sequential applications to avoid resistance are not met with commonly used mixtures. To be most effective at preventing resistance evolution, both herbicides used sequentially or in tank mixtures should have the same spectrum of control and should have similar persistence.
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