Tiny biocontrol insects, released by the Centre for Biological Control, are preventing flowering and suppressing growth — a long-term solution to South Africa’s most problematic aquatic invasive plant
The dam is the main source of water for drinking, agriculture and industry, but officials have been ‘ignoring’ the problem since 2017
Biological control is effective but the real solution would be to fix wastewater treatment plants in Joburg and Pretoria and stop sewage spills