How Overlooked Plants Like the Potato Bean Can Be Tamed to Feed the World

We need new crops. Thousands of years of breeding and decades of genetic modification have made the crops we sow predictable, easy to harvest, and capable of feeding more than 9 billion people. But they are also vulnerable to disease, pests, and the whims of weather. That’s troubling, because global warming is bringing more disease, more pests, and more whimsical weather. On current trend lines, global wheat and soybean harvest yields could fall by nearly 30 percent by midcentury. Corn yields could drop by 7.5 percent. In the baking-hot European summer of 2003, plant growth fell by 30 percent. By 2050, that kind of summer will be the new normal. “Suppose the US breadbasket ends up with a climate like Texas,” Cannon said at a genetics meeting last year. “We need to look to species already adapted to extremes.”

The potato bean is one of those species. ”

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