Please define "easy" 
btw - as Greg indicated, HABITAT @ 1/2% solution + a MSO surfactant ~ topically applied only to infested areas, would be my suggestion. But, be careful when treating shoreline-areas (above the water-line) that are adjacent to desirable trees (i.e. their roots), since HABITAT is also soil-active and can be absorbed through root-uptake.
And don't waste your time spraying areas that were previously treated with WEEDTRINE D (or anything else for that matter), until the weeds have fully recovered and ARE HEALTHY & ACTIVELY GROWING. Systemic herbicides will generally work best (or ONLY) on healthy plants that are not stressed in any manner (i.e. by drought, bug-feeding damage, disease, etc).
