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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.
Public complaints have triggered a process to determine whether the clearing methods are in line with the regulatory environment.
Water lettuce, an invasive aquatic weed, multiplies at an astonishing rate, keeping authorities and residents on their toes as they try to keep up with rapid infestations.
Rand Water has begun spraying herbicide on the water lettuce invasion on the Vaal River and releasing weevils as biological control agents.
Two students and a recent grad share their experience at Entomology 2023 as participants in ESA and the CDC's Public Health Entomology for All program.