The idea of espionage over farm crops and food is novel to most consumers. However, the U.S. government has identified the sector as ripe for spying for years, and two recent cases illustrate that point.Industrial espionage of the seed corn variety is making a splash in the media. The New Republic published a story last week by Ted Genoways, "Corn Wars," which is about a 2011-12 investigation into the alleged stealing of proprietary seed corn samples by Chinese nationals in the U.S. and Canada and their attempt to take those seeds to China. It also covers the 2013-14 action taken against them. Genoways is an investigative reporter who has covered the standard salacious food and agricultural controversies, most recently including the whistle...