NDLI: The role of eutrophication in the biological control of water hyacinth, Eichhornia crassipes, in South Africa

Content Provider	Springer Nature Link
Author	Coetzee, Julie A. Hill, Martin P.
Copyright Year	2011
Abstract	South Africa has some of the most eutrophic aquatic systems in the world, as a result of the adoption of an unnecessarily high 1 mg l−1 phosphorus (P) standard for all water treatment works in the 1970 s. The floating aquatic macrophyte, water hyacinth (Eichhornia crassipes (Mart.) Solms (Pontederiaceae)), has taken advantage of these nutrient rich systems, becoming highly invasive and damaging. Despite the implementation of a biological control programme in South Africa, water hyacinth remains the worst aquatic weed. A meta-analysis of published and unpublished laboratory studies that investigated the combined effect of P and nitrogen (N) water nutrient concentration and control agent herbivory showed that water nutrient status was more important than herbivory in water hyacinth growth. Analysis of long-term field data collected monthly from 14 sites around South Africa between 2004 and 2005 supported these findings. Therefore the first step in any water hyacinth control programme should be to reduce the nutrient status of the water body.
Starting Page	247
Ending Page	261
Page Count	15
File Format	PDF
ISSN	13866141
Journal	BioControl
Volume Number	57
Issue Number	2
e-ISSN	15738248
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-11-25
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Eutrophication Water hyacinth Biological control Integrated management Entomology Plant Pathology Behavioural Sciences Animal Biochemistry Animal Ecology Agriculture
Content Type	Text
Resource Type	Article
Subject	Insect Science Agronomy and Crop Science

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