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 weeping willow tree, a member of the Salicaceae family, can be planted in USDA Hardiness Zones 2 through 9. They can grow from 45 to 70 feet high, and a healthy willow tree will produce a canopy in a width equal to its height. A diseased willow tree, however, may lose its leaves until the disease is identified and corrected.