Factors Leading to the Development of Herbicide Resistance
Because weeds contain a tremendous amount of genetic variation that allows them to survive under a variety of environmental conditions the development of a resistant species is brought about through selection pressure imposed by the continuous use of an herbicide. Long residual preemergence herbicides or repeated application of postemergence herbicides will further increase selection pressure.
Factors that can lead to or accelerate the development of herbicide resistance include weed characteristics, chemical properties and cultural practices.
Weed characteristics conducive to rapid development of resistance to a particular herbicide include: