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Tiny weevils are waging war on the invasive water lettuce plant choking South Africa’s Vaal River

By Julie Coetzee, Deputy Director of the Centre for Biological Control at Rhodes University and Biological Control and Freshwater Alien Invasive Species Management, South African Institute for Aquatic Biodiversity

Water lettuce forms dense mats on the water surface. This can reduce light penetration and oxygen levels in the water, negatively affecting all aspects of aquatic life.

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