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.
Landscapers prize weeping willows for the graceful, draped foliage of this ornamental tree. The weeping willow features narrow leaves shaped like a lance. Leaf length can be up to 8 inches, with leaves hanging vertically off the branch to create the flowing look associated with this plant. Willows produce a medium green leaf that transforms to yellow in the fall.