Pensacola News Journal

For: Saturday, Aug. 24, 2002

By: Daniel E. Mullins

Extension Horticulture Agent

Santa Rosa County

Invasive Plant Threat Continues

It is time to declare war on the Popcorn Tree and several other exotic invasive plant species that are steadily taking root in Northwest Florida. This should be a priority because there is a serious threat to the ecology of our area.

These plants, which were introduced from other parts of the world, have few natural enemies in this new environment. The more aggressive species have the ability to out – compete our native species.

Once exotic plant species dominate an area, native wildlife including birds, insects, mammals and other animals either leave or die. This phenomenon is known as extirpation and it happens because native wildlife is dependent upon native vegetation for food, shelter, and reproduction.

The Popcorn Tree or Chinese Tallow Tree should be the first target. Botanically it is Sapium sebiferum. This exotic likes the conditions here. It is found thriving under both upland and wetland conditions, crowding out native plants.

I just found one in my own back yard, but it is not long for this world. Snuggled up against a post in a natural area, it has now grown for 2 seasons undetected. Fortunately it has not reached seed bearing age. If it had, there would have been real trouble because a mature popcorn tree can produce 100,000 seeds which are over 90% viable.

Popcorn tree is currently the worst threat but there are other non-native plant species of equal concern. The University of Florida maintains a web site containing 12 terrestrial and 24 wetland invasive plants. It also provides color photographs for help with identification and recommended control measures.

A look at this site reveals some surprises. In addition to the popcorn tree, the list includes Chinaberry, Camphor Tree, Old World Climbing Fern, Japanese Climbing Fern, Water Hyacinth and Torpedo Grass.

The list is sure to be updated as scientists and others continue to evaluate the effects of the different exotic and invasive plant species. To view and print the list, go to http://aquat1.ifas.ufl.edu.

Our office has recently received a new 4 page publication that deals with the identification and control of the popcorn tree. It contains color images and specific products and techniques for use in ridding your property of this awful tree.

There are several upcoming educational opportunities on this subject. Leon County is providing a day long program on October 8. It will involve classroom and field training. Topics include the identification of invasive plants, legal issues and recommended control measures. Continuing Education Units are also being offered.

Details about this program, including registration information can be obtained by contacting the Leon County Extension office, 615 Paul Russell Rd, Tallahassee, FL 32301 or call (850)487-3004. A similar program will be offered in the Pensacola, Milton or Crestview area within the next few months.