State regulators would have to tell the California legislature about a limited use of chlorpyrifos, a powerful insecticide linked to brain damage in children, under a bill heading to the governor. The measure, SB 86, was approved by the Assembly and Senate Sunday. It would require the state Department of Pesticide Regulation to detail the granular, or non-liquid, use of chlorpyrifos, which accounts for roughly 1% of its total use. The state banned all uses of chlorpyrifos as of 2021 over health concerns.