Environmental Engineering Reference
In-Depth Information
(a)
(b)
Fig. 10.3
An infestation of water lettuce (
Pistia stratiotes
) at Cape Receife,
South Africa (a). The weevil,
Neohydronomus affi nis
was released here in 2005,
and has succeeded in reducing the infestation to a few isolated plants that
occur on the waters edge (b).
The long-term management of aquatic weeds requires an integrated management
approach utilizing all appropriate control methods with special emphasis on the
need to reduce the infl ow of nitrate and phosphate pollutions into the aquatic
environment (Hill 2003).
