The world's most common banana, the Cavendish, could die. A disease called TP4 is killing it. The disease stops the banana from getting water. Scientists found TP4 in 1990. It quickly spread across Asia. Then it went to Africa. TP4 is carried by the wind, water, cars and people. A small amount of TP4 spreads across large areas.

Fifty years ago we ate a different banana. This was killed by Panama Disease. By 1965, banana growers changed to the Cavendish banana. This is now in trouble. TP4 stays in the ground for a long time, so new plants cannot grow. We could grow GM bananas. Diseases like TP4 cannot kill them.