California continues to target chlorpyrifos, a pesticide linked to neurological delays in children, with strict new allowable exposure limits and even a possible ban on the pesticide.

The widely used pesticide on fruit, vegetable, and nut crops is the focus of two California regulatory actions, a pending state bill, and a federal appeals court order for the U.S. Environmental Protection Agency to decide whether to ban chlorpyrifos.

In addition, Sen. Tom Udall (D-N.M.) has sponsored federal legislation to ban it nationally.

The California Office of Environmental Health Hazard Assessment is proposing for the...