VOICES Voices Icon Ideas and Insight From Explorers


Plant-Munching Weevil Helps Botswana Contain Weeds Threatening to Overwhelm the Okavango

Three decades after the first reports of the arrival in Botswana of Salvinia molesta–a free-floating, mat-forming water fern native to Brazil– scientists from the southern African country’s Department of Water Affairs say they are at last prevailing in the struggle against a weed that has come close to threatening the entire Okavango, Africa’s largest wetlands that is a UNESCO World Heritage site and home to some of the world’s most endangered species.