This is the 2nd in a series of feature stories on environmental topics by Knight Center students who attended the 2025 Society of Environmental Journalists conference.

By Ruth Thornton

Ruth Thornton

The widespread use of several potent pesticides remains a problem in several countries, according to investigative reporters.

Their research shows that the often-cozy relationship between government officials who issue permits and the industry endangers not only the environment but also human lives.

The reporters discussed their reporting on a panel at this year’s Society of Environmental Journalists’ annual conference at Arizona State University.

Panel members were Liza Gross, a reporter with Inside Climate News, Sanket Jain, an independent journalist, Talli Nauman, a contributing editor at Buffalo’s Fire, and Carla Ruas, a freelance journalist. The panel was moderated by Mark Schapiro, an investigative journalist and lecturer at the University of California, Berkeley Graduate School of Journalism.

Toxic fumigant pesticide use in California

The “toxic fumigant 1,3-D should probably not be on the market, because it’s been known to be a carcinogen for years,” Gross said.

The fumigant 1,3-D, short for 1,3-Dichloropropene, is a pesticide also known under its tradename Telone. It is applied to farm soils to control nematodes, a type of worm that can harm crops, according to the Environmental Protection Agency. It was first registered in the 1950s.

SEJ Pesticide Panel

Gross said she originally focused on that chemical when an advocacy group in California was upset that regulators in the state proposed standards that would have exposed residents near application sites to about 14 times the safe amount.

“When I started looking into 1,3-D’s regulatory history, I found some troubling things that were going on at the federal level,” Gross said.

“It was pretty clear, without that much digging, that I could test the idea that there was regulatory capture going on there,” she said. Continue reading →