2017 ASHS Annual Conference

Native plant species are often promoted because of the many benefits they provide including providing food and habitat for wildlife, less inputs and maintenance, adaptability to local climatic conditions, increased tolerance to pest species, and aesthetic appeal. The nursery industry has been a major avenue for invasive plant introductions in the past. Several authors have estimated that over 80% of invasive woody plants were once introduced, at least in part, for ornamental purposes, which is another selling point for native plant enthusiasts. Invasive plant species are by definition non-native, but many of the most economically important weed species in natural areas, landscapes, and in agricultural production are native to the areas in which they “invade” or become weedy pests. This presentation will focus on several of the most prolific native “pest” species in the Deep South U.S. ranging from Eclipta to Liquidambar to Smilax, and many species in between. This presentation will focus on not only how the biology of these species allows them to become invasive and outcompete other indigenous species, but will also discuss the changes we have made to our environment that allow these species to proliferate and become more problematic than they once were.