MI HB4858

Prohibits use of neonicotinoid pesticides on public land beginning 1 year after the bill's effective date, with exceptions only for valid environmental emergencies when no other pesticide would be as effective.

Requires the Department of Natural Resources to report to the legislature within 1 year on peer-reviewed evidence regarding outdoor neonicotinoid pesticide safety for monarch butterflies, other pollinators, beneficial insects, the environment, and public health.

Allows local units of government to enact ordinances that regulate neonicotinoid pesticides and impose stricter requirements than the state prohibition.

Defines neonicotinoid pesticides as a class affecting insect central nervous systems, specifically including acetamiprid, clothianidin, dinotefuran, imidacloprid, thiacloprid, and thiamethoxam.

Defines "valid environmental emergency" as sudden-onset disasters or accidents from natural, technological, or human-induced factors that cause or threaten severe environmental damage and loss of human lives or property.