The image above shows a thick green mat of an invasive South American aquatic plant known as Salvinia minima, which is taking over freshwater bodies in South Africa’s northern region. Researchers and environment officials are trying to fight back by introducing little black beetles called weevils that can feed on the plant and help control its population. The weevils were imported from Louisiana, where they have been used in a successful biocontrol program against the same invasive species. According to experts, the plant blocks out sunlight and can lead to the destruction of aquatic ecosystems. The government is also considering fines for those who pollute water resources. The rapid growth of Salvinia in the country’s northernmost provinces has raised concerns about its potential to invade neighboring countries where water security is already a challenge.

Source: http://www.africanews.com/2025/03/30/weevils-tackle-invasive-salvinia-in-south-africa/