Biocontrol agents make infected cacti unhealthy and help to control their spread.
Photo: C Mannheimer
Many invasive cactus spread aggressively, to the detriment of other plants and the whole ecosystem.
Photo: C Mannheimer
A healthy Imbricated cactus. This species is aggressively invasive, forming impenetrable stands.
Photo: C Mannheimer

Alien Watch posters

Information on some of the most invasive alien plants in Namibia has been compiled into a series of 'Alien Watch' posters which can be downloaded below.