How a 'Potential Agroterrorism Weapon' Allegedly Got Into US

Officials say Chinese couple smuggled the crop-killing fungus into the country
Posted Jun 4, 2025 2:00 AM CDT
How a 'Potential Agroterrorism Weapon' Allegedly Got Into US
Stock photo of wheat.   (Getty Images / Julia Klueva)

Two Chinese nationals are facing federal charges after allegedly smuggling a crop-destroying fungus—deemed a potential agroterrorism weapon—into the United States. Yunqing Jian and Zunyong Liu are facing federal charges in Michigan over the fungus, Fusarium graminearum. Authorities allege Liu attempted to bring the fungus through Detroit's airport to study it at a University of Michigan lab where Jian, his girlfriend, worked, the BBC reports. They say Jian may already have been handling the fungus at the lab without the necessary federal permits, the Guardian reports.

The fungus in question is known to cause disease in major crops such as wheat, barley, maize, and rice, with the potential to destroy yields and contaminate food supplies, according to the US Attorney's Office. Its presence can lead to vomiting and liver damage if it enters the food chain and is ingested, and officials note the pathogen is cited in scientific literature as a possible "agroterrorism weapon." It can also cause reproductive defects in both humans and livestock. It's blamed for economic losses in the billions across the globe annually.

Prosecutors say Jian is a member of China's Communist Party and received Chinese government funding for her research on the fungus back in China. US Attorney Jerome F. Gorgon Jr. called the case a matter of the "gravest national security concerns," claiming the scheme involved using a university lab to further unspecified goals. The case comes at a time of heightened US-China tensions, following new visa restrictions for Chinese students announced by the Trump administration and trade disputes between Washington and Beijing. Jian has appeared in court, but Liu returned to China after being turned away at the Detroit airport last year. (This content was created with the help of AI. Read our AI policy.)

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