Dietary fiber or roughage is the indigestible portion of food derived from plants. It has two main components: 1  Soluble fiber, which dissolves in water, is readily fermented in the colon into gases and physiologically active byproducts, and can be prebiotic and viscous.
Usage. If the willow tree is small, apply the herbicide as a foliage spray covering the willow's entire foliage until the chemical begins to drip off the leaves. For larger willow trees, cut the upper and lower branches off with a chainsaw and cut the trunk as close to the ground as possible.
Step 4. Prune the dappled willow in early winter or early spring when it lies dormant. Cut out any dead, diseased, infested or broken branches with pruning shears. For a short, dense plant, prune all branches down to 12 inches tall every few years.