4-Speed® XT herbicide provides fast, effective post-emergent control of a wide range of broadleaf weeds in a variety of settings including golf courses and professional turf. The power behind the performance is a unique blend of active ingredients. In 4-Speed XT, the tough weed killer, triclopyr, is combined with 2,4-D, dicamba and pyraflufen-ethyl to create a combination lethal to virtually any broadleaf weed.