Excerpt
FRED DE SAM LAZARO (Newshour): When the price of bread and other food staples goes up in the developing world, riots often result. What would happen if the majority of the world's wheat crop was wiped out by disease is unfathomable.
PETER NJAO, plant pathologist: This is a susceptible variety. And, actually, the disease is eating the whole plant.
FRED DE SAM LAZARO: Scientists Peter Njao and Ruth Wanyera say a fungal disease thought long under control called wheat rust is back and could destroy 80 percent of all known wheat varieties if it isn't stopped in its tracks.
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