PASCAGOULA, Mississippi -- Synthetic marijuana is now illegal in Mississippi.

Gov. Haley Barbour today signed a bill immediately banning the sale and possession of the herbal mixture known by names such as Spice, K2, Demon, Voodoo, Genie and Zohai.

Retailers can't sell the products, but they have until Oct. 1 to return them to distributors or turn them over to law enforcement.

"This bill gives our law enforcement the support they need to rid our communities of synthetic marijuana," Barbour said.

"Effective immediately, all store owners must stop selling this drug, and consumers caught with it will face serious consequences. I appreciate the hard work by the Legislature to swiftly pass this important measure and protect our communities," Barbour said in a statement.