What causes an estimated 90,000,000 bushel yield loss of soybean in the North Central U.S. each year? What can cause an eye-popping 30 percent yield loss without above-ground symptoms? What can move any way that soil moves? What can invade a soybean plant and cause more severe brown stem rot and sudden death syndrome symptoms?

The answer to each question is the same: the soybean cyst nematode (SCN).