Abstract

In this study, we investigated three different treatment options for controlling infestations of the aggressive Invasive Alien Plant Species (IAPS) Lantana camara at the Emantini Game Reserve in Swaziland. Treatment options included cut stump treatment, foliar spraying with herbicide and hand pulling using a manual plant puller. Results from this study indicated that foliar spraying significantly reduces new growth compared to other treatment options investigated. Associations between the various treatments and regrowth were not significant. Comparisons of the various treatments using a contribution index (CI) showed that foliar spraying is the most effective overall treatment for controlling L. camara at our study site. Foliar spraying worked best on plants less than 1.5 m high, but cut stump treatment was most effective for thickets where plants needed to be cut before being treated. To improve the effectiveness of foliar spraying, we suggest that this treatment option be used in combination with cut stump treatments. Findings from this study provide valuable information for the control of L. camara in different growth stages and levels of infestation. Recommendations for the control of this IAPS can be used in similar environments to effectively control infestations.

Key words: Invasive alien plant control, invasive alien plant species (IAPS), Lantana camara, Swaziland.