A new strain of wheat rust - known as Ug99 - is decimating wheat fields worldwide. But help could be at hand in the form of nuclear science. The Joint Division of the IAEA and the UN´s Food and Agriculture Organization has brought together experts from around the world to develop Ug99 resistant wheat varieties by using radiation to induce mutations in seeds. Louise Potterton spoke to one of the experts, William Wagoire from Uganda, who first detected the new strain.