Battling the blight
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Battling the blight Bean blight's reach expands to both tropical and temperate regions of the world. Shree Singh, a professor at the University of Idaho, has spent his career researching ways to generate cultivars of common bean resistant to diseases. According to Singh, "Common blight is by far the most severe and widely occurring bacterial disease that adversely affects common bean production worldwide." Common blight is caused by two species of bacteria belonging to the Xanthomonas genus. It is a difficult disease to attack. The bacteria can move along with seeds and plant matter. "When contaminated seeds are planted, the bacteria can then go on to infect the germinating plant and spread further," says Singh. Infected plant matter left behind after harvest can also infect the next cycle of crops. Complicating matters further, different strains of the bacteria can exist on the same seed. In fact, "A single field in Wisconsin yielded more than