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.
The Original. The standard weeping willow (Salix babylonica) features reddish-brown twigs that add winter interest to your landscape after the leaves fall. It grows to 50 feet tall and 20 to 40 feet wide at a rate of 36 inches per growing season. It prefers a site with full sun to partial shade.