Box 4.1 (continued)
unpublished data). The furthest the species has spread from a single location is
27 km in the uMngeni River system in KwaZulu-Natal.
Integrated chemical and mechanical control of S. platyphylla has not
succeeded in slowing its spread in South Africa, as it continues to invade
new sites. Options for biological control using host specific weevils in the
genus Listronotus (Coleoptera: Curculionidae) are currently under investigation in quarantine at Rhodes University’s Centre for Biological Control.
Increase in the number of sites invaded with Sagittaria platyphylla (Delta Arrowhead) in
South Africa since its first identification in 2008
Spread (in km) of Sagittaria platyphylla (Delta Arrowhead) from key invasion sites in
South Africa
4 Invasive Alien Aquatic Plants in South African Freshwater Ecosystems
105
unpublished data). The furthest the species has spread from a single location is
27 km in the uMngeni River system in KwaZulu-Natal.
Integrated chemical and mechanical control of S. platyphylla has not
succeeded in slowing its spread in South Africa, as it continues to invade
new sites. Options for biological control using host specific weevils in the
genus Listronotus (Coleoptera: Curculionidae) are currently under investigation in quarantine at Rhodes University’s Centre for Biological Control.
Increase in the number of sites invaded with Sagittaria platyphylla (Delta Arrowhead) in
South Africa since its first identification in 2008
Spread (in km) of Sagittaria platyphylla (Delta Arrowhead) from key invasion sites in
South Africa
4 Invasive Alien Aquatic Plants in South African Freshwater Ecosystems
105