The biological pathogen federal authorities accuse two Chinese nationals of smuggling into the U.S. was not likely an act of "agroterrorism," according to experts.

Fusarium graminearum — the fungus federal prosecutors say a University of Michigan scholar and her boyfriend attempted to smuggle into the U.S. — is a dangerous strain of a common fungus that can infect wheat, rice, oats and other cereal plants. It can cause devastating crop damage and potentially make infected grains dangerous to eat.