Native to South America, water hyacinth is said to be the world's worst aquatic weed. It thrives in nutrient-rich waters such as Hartbeesport Dam, forming dense and impenetrable mats, affecting boating, fishing and water sports activities and harming aquatic biodiversity. . (Delwyn Verasamy/M&G)
Tiny planthoppers are biological control agents and natural enemies of the world's worst aquatic weeds
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Tags: article, biological control, biological control centre, Ferial Adam, Hartbeespoort Dam, Julie Coetzee, planthopper, green guardian, river Vaal, water hyacinth, water lettuce