One effective way to delay or manage weed resistance is to use herbicide tank mixes with different modes of action.
Weeds are composed of various biotypes that differ in their resistance to certain herbicide Groups. If the same herbicide Groups are used repeatedly on the same field every year, then the biotypes which are resistant will remain in the field. Tank mixing multiple effective modes of action to control the same weed biotype is essential in combatting resistance.
Mixtures Work Best
Research has shown that tank mixes are more effective at delaying resistance than herbicide rotations.
A 4-year study* comparing resistant weed populations when rotating herbicides versus tank mixing herbicides, showed that applying tank-mixes every year was as effective as never having applied a herbicide in delaying resistance.