Scholtz, Clarke H.2013-09-072007-10-082013-09-072002-09-012007-10-082007-10-08Oberholzer, IG 2007, The effect of nutrient rich water on the biological control of water hyacinth, M Inst Agrar Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/28536>Pretoriahttp://hdl.handle.net/2263/28536Dissertation (M Inst Agrar (Sustainable Insect Management))--University of Pretoria, 2007.Please read the abstract on p1 of the document 00dissertation© University of PretorHyacinths effect of water pollution onAquatic weeds effect of water pollution onAquatic weeds biological control south africaUCTDDissertationhttp://upetd.up.ac.za/thesis/available/etd-10082007-131604/