Allow the leaves of the plant to grow until they are long enough to touch the ground. Separate the leaves into groups that you can fit your hand around. Wrap a rubber band low around each group.
Cut off the tip of each leaf with sharp gardening shears. Make sure the end of each leaf is open, but do not remove too much; you want the plant to still go through photosynthesis. Cover the exposed interior of each leaf with a strong, long-term herbicide, such as one that contains glyphosate.
Apply more herbicide every few days throughout the entire growing season. As new leaves appear, add them to a group, slice off their ends and spray them with the herbicide. Dig up the plant and all of the roots once the top of the plant is dead.