Tree Notes is about trees -- especially native trees, trees for wildlife, and trees in history.

Thursday, June 28, 2007

Kudzu at Natchez Trace State Park in western Tennessee

Erosion control gone bad



Kudzu at Natchez Trace State Park, TennesseeKudzu vines at Natchez Trace State Park

Kudzu is an aggressive, fast-growing, invasive vine from Japan. It's a big problem in the woodlands of the southern United States, where it completely overgrows native trees, shrubs, and plants, depriving them of sunlight and weighing them down.

Established stands of kudzu are very difficult to eradicate because roots can be 12 feet deep! In some areas, it has become resistant to the herbicides that have been used on it. It can grow up to a foot per day.

We recently stopped for an impromptu picnic lunch at the Natchez Trace State Park, just off I-40 east of Jackson, TN. The ravine below the picnic area is completely overgrown with kudzu. I hated to see that.

The picnic area is shaded by tall pine trees. A thick natural mulch of pine needles and cones pads the ground. Here and there, a long runner of kudzu was snaking across the pine needles, looking for a tree to climb. I am sure the area is regularly patrolled by park workers to hold the kudzu at bay

When we went to the museum at the park headquarters after lunch, we learned that kudzu was planted in Natchez Trace State Park during the 1930's for erosion control. I had a vague recollection that kudzu had been planted for erosion in Florida, but I didn't realize that it had also happened in Tennessee.

The hilly land in the area had become badly eroded due to deforestation and farming. Through the New Deal and other programs, the land was purchased and the impoverished farmers of the area were resettled elsewhere. Then CCC workers were brought in. They planted pines to reforest the cleared areas and kudzu to hold the soil on badly eroded hillsides and gullies.

This story of farmers being bought out and moved is identical to what happened in the Pennyrile State Forest in northern Christian County, KY (about 30 miles from where I live.) The CCC planted pines in Pennyrile also. I would like to know if kudzu was also planted at that time. (Kudzu does grow there.) I know a forester who works there, and I will ask him.

I've blogged about several different invasive species lately. I don't intend for this blog to become a chronicle of invasive species, but the effects of some of them are so terrible that I can't ignore them!

3 comments -- please add yours:

Collagemama said...

Natchez Trace State Park is a beautiful place, even with the kudzu overgrowth. On impulse I turned off I-40 because I was too tired to face rush hour driving in unknown Nashville. I found a lovely, lush, green tall pine forest full of birds and deer. Instead of spending the night at a Super 8 at some interchange, I enjoyed an evening watching purple martins from the balcony of the Pin Oak Lodge. I saw a bluebird--only the second in my life.

Genevieve said...

I'm glad you got to see a bluebird, and I hope you'll get to see some more on your future travels.

It is exciting to see and recognize a bird you've read about. I know I got pretty excited when a pilleated woodpecker flew across the road in front of me one day. I've never seen one since.

I am sure you have some interesting wildlife in your part of TX that help make up for a lack of bluebirds.

Rock rose said...

We just spent the night at NTSP. I knew about kudzu but if I hadn't seen it with my own eyes I would never have believed it . I am in shock and to learn it was introduced.

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Print references I frequently consult

Benvie, Sam. Encyclopedia of North American Trees. Buffalo, NY: Firefly, 2000.

Brockman, C. Frank. Trees of North America: A Guide to Field Identification. Ed. Herbert S. Zim. New York: Golden, 1986.

Cliburn, Jerry, and Ginny Clomps. A Key to Missouri Trees in Winter: An Identification Guide. Conservation Commission of the State of Missouri, 1980.

Collingwood, G. H., Warren David Brush, and Devereux Butcher. Knowing Your Trees. Washington: American Forestry Association, 1978.

Dirr, Michael. Dirr's Hardy Trees and Shrubs: an Illustrated Encyclopedia. Portland, Or.: Timber, 1997.

Elias, Thomas S. The Complete Trees of North America; Field Guide and Natural History. New York: Book Division, Times Mirror Magazines, 1980.

Grimm, William Carey. The Book of Trees;. Harrisburg, PA: Stackpole, 1962.

Hightshoe, Gary L. Native Trees, Shrubs, and Vines for Urban and Rural America: a Planting Design Manual for Environmental Designers. New York: Van Nostrand Reinhold, 1988.

Little, Elbert L. National Audubon Society Field Guide to North American Trees. New York: Chanticleer, 1996.

Martin, Alexander C., Herbert S. Zim, and Arnold L. Nelson. American Wildlife and Plants. New York: McGraw Hill, 1951.

Mitchell, Alan F., and David More. The Trees of North America. New York, NY: Facts On File Publications, 1987.

Randall, Charles E. Enjoying Our Trees. Washington: American Forestry Association, 1969.

Settergren, Carl D., and R. E. McDermott. Trees of Missouri. Columbia: University Extension, 1995.

Sternberg, Guy, and James W. Wilson. Native Trees for North American Landscapes: from the Atlantic to the Rockies. Portland: Timber, 2004.

Wharton, Mary E., and Roger W. Barbour. Trees and Shrubs of Kentucky. Lexington: University of Kentucky, 1973.

Wyman, Donald. Trees for American Gardens. New York: Macmillan, 1965.

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