If you don't like the thought of "spraying", and you don't have too large of an area to manage, you might consider building or buying a rope-wick applicator.
I built two rope-wick applicators last night in 20 minutes for a customer who needs to selectively treat cattails within stands of water-iris. The parts were around $15 per applicator - mostly comprised of the pvc ball-valve ($3.50) and the two brass-pvc adapters ($3.50 ea): all available at Home Depot. The stainless-steel screws threaded into the adapters engage the rope and prevent it from pulling out.
The handle serves as a reservoir to hold a high concentration of glyphosate herbicide + water (usually 50:50), with the ball-valve positioned at the handle's base to regulate or shut-off fluid-flow to the wick (rope). Don't forget to install a threaded-cap at the upper-end of the handle/reservoir.
Once the wick is wetted with solution, either partially or completely close the ball-valve until the wick needs more solution. Use the wand-wick to wipe the solution onto targeted plants - but avoid overwetting the wick and dripping solution onto any desirable plants.
