Nutrient dynamics of Kariba weed

Zolile Maseko, Julie A. Coetzee, Martin P. Hill- Zoology and Entomology Department , Rhodes University, Grahamstown

Cyrtobagous salviniae has proved to be a very effective and deleterious grazer on the ubiquitous aquatic invader Salvinia molesta, which has been a global menace of freshwater systems.

Despite the many successes of the weevil, it has however failed to record success in areas where salvinia grows as an understory species.

Previous studies highlighted the fact that there is a failure to achieve biological control of salvinia under shade conditions.

Therefore the focus of this research is on the effects of shade on the nutrient dynamics of salvinia and how in turn this affects the success of biological control by Cyrtobagous salviniae.

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