Invasive Weeds in Georgia

Evans, C.W., C.T. Bargeron, D.J. Moorhead & G.K. Douce. 2005. The Bugwood Network, The University of Georgia.

Giant reed

Arundo donax L.

Giant reed is a tall plant up to 20 feet in height, with stems that resemble corn stalks. The stem is hollow and jointed every 1 to 8 inches. The long, lance-shaped leaves are alternately arranged and resemble corn leaves. Giant reed is most easily recognized by its large, dense flower or seed plume, which is up to 3 feet in length. Giant reed grows in distinct, very dense clumps.

Giant reed is native to India and was introduced into the United States in the early 1800s. It has been planted throughout the warmer areas of the United States for ornamental purposes and erosion control. It has also been used for a variety of products including music reeds, fishing rods, livestock fodder and medicinal purposes. It occurs throughout the southern United States and is widespread in Georgia.

Giant reed invades wet areas such as ditches, stream banks and lakeshores. Reproduction occurs mainly by sprouting. Giant reed can easily suppress and eliminate native vegetation completely. In addition to displacing native vegetation, giant reed also reduces wildlife habitat, increases fire risks, and interferes with flood control.

Recommended herbicides for control:
Foliar spray – glyphosate, Arsenal AC, or combination of both

Photo by David Moorhead, UGA