A crop-killing fungus is spreading out of Africa towards the world’s great wheat-growing areas
IT IS sometimes called the “polio of agriculture”: a terrifying but almost forgotten disease. Wheat rust is not just back after a 50-year absence, but spreading in new and scary forms. In some ways it is worse than child-crippling polio, still lingering in parts of Nigeria. Wheat rust has spread silently and speedily by 5,000 miles in a decade. It is now camped at the gates of one of the world’s breadbaskets, Punjab. In June scientists announced the discovery of two new strains in South Africa, the most important food producer yet infected.
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