Assembly committee advances bill to block online marketplaces from facilitating sale of noxious weeds

Assemblymember Irwin presented AB 2143 to address the sale and shipment of designated noxious weeds through e‑commerce platforms, saying online marketplaces have become a modern vector for invasive species that damage crops, native ecosystems and water resources.

"AB 2143 addresses this issue by banning online marketplaces from accepting payment for noxious weeds that would be shipped to a delivery address within the state," Assemblymember Irwin told the committee.

UC Davis weed‑science professor Mohsen Meskura testified that online availability of harmful species is "deeply concerning," reporting that his lab found over one‑third of listed highly harmful pests available on major marketplaces and warning that species such as witchweed and pampas grass pose severe agricultural and fire risks.

Industry and agricultural organizations including California Citrus Mutual and other trade groups supported the measure; witnesses noted an existing list of designated noxious weeds and offered a database to help platforms block prohibited sales.

Supporters argued prevention is far less costly than eradication: Meskura said once invasives become established, eradication is frequently impossible and control costs are large. Agricultural representatives also said online sales circumvent traditional inspection points and broaden pathways of introduction.

The committee moved AB 2143 forward (motion carried); members emphasized coordination with marketplaces and the practicality of giving platforms a usable database to screen listings.

The bill will be considered in further committees for policy and oversight.