Aquatic weed survey 2013
Grant Martin-Department of Zoology and Entomology, Rhodes University
Annually, the Rhodes University Entomology Department, funded by Working for Water, Department of Water Affairs, conduct a national aquatic weed survey.
To date in 2013 over 150 aquatic weeds sites has been assessed in the Eastern Cape, Western Cape, Kwazulu Natal, Free State, Gauteng and North West provinces.
High numbers of biological control agents were found at the majority of Water hyacinth (Eichhornia crassipes), Water lettuce (Pistia stratiotes)-, Salvinia, Parrot’s feather (Myriophyllum aquaticum) and red water fern (Azolla filiculoides) sites.
Excellent control was noted at the majority of the sites, however, a couple of sites were found to have no biological control
For more information see the fact sheets below: