Prosopis invasion has tremendous negative effects on biodiversity and water resource management in Southern Namibia. There are three Prosopis species in Namibia, with the most occurring one being P. glandulosa found in riverbeds and along dry water courses. These species are known to be aggressively invasive as they outcompete indigenous species.
As with bush encroachment, it is essential to develop sound approaches for controlling Prosopis in Namibia. Prosopis can be controlled through manual, chemical semi-mechanised methods or a combination of any of these methods. Semi-mechanised is the most preferred method due to its selectiveness which allows to target specific plant species. Cutting has to be done in an effective manner to avoid causing damage to other indigenous vegetation. The Prosopis species has an immense ability to regrow from coppicing buds. Therefore, cutting below ground level, i.e. below the coppicing buds and applying aftercare is recommended.
A recent study provides information on Prosopis invasion in the South and a potential concept for community based control, using a case of the /Ai-/Ais-Richtersveld Transfrontier Park.
Read the full study here.