Fusarium wilt, a fungus that causes disease in bananas, is on the rise in Mozambique and poses a threat to food security in Africa, according to Professor Gert Kema of Wageningen University & Research (WUR). The disease, caused by the strain TR4, has spread from Asia to South America and Africa in the past decade. Kema warns that efforts to control the spread have failed, and the ultimate solution lies in breeding new resistant varieties. WUR and cooperation partner KeyGene are involved in a major breeding initiative, and Kema is also working with Chiquita to develop new banana varieties. A study published in the scientific journal Plos One has found a way to elicit an immune response in Cavendish using an avirulent Fusarium strain, which could contribute to future solutions.