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Water hyacinth, native to South America, is described as the world’s worst aquatic weed. It thrives in nutrient-enriched waters like Hartbeespoort Dam, forming dense impenetrable mats that affect boating, fishing and water sport activities and harms aquatic biodiversity. (Delwyn Verasamy/M&G)

Tiny bugs reduce water hyacinth on Hartbeespoort Dam to 5%

Biological control is effective but the real solution would be to fix wastewater treatment plants in Joburg and Pretoria and stop sewage spills

  • Sheree Bega
9 min read