From the San Jose Mercury News:

For all the companies in the state joining E-Verify, however, hundreds of thousands have not, and agriculture is among the least represented industries, according to a list of E-Verify users obtained by this newspaper.

"There is one industry that I believe has historically shown it relies on foreign labor, and that's agriculture," said U.S. Rep. Dan Lungren, R-Gold River.

Eighteen other states have made E-Verify use a requirement for some or all employers. California did the opposite this month, banning itself and local jurisdictions from mandating the program. The bill by Assemblyman Paul Fong, D-Cupertino, which takes effect Jan. 1, was backed by immigrant advocates but also the California Chamber of Commerce and agriculture groups.

"Overall, for the companies that have chosen to voluntarily participate, it's worked very, very well," Lungren said of E-Verify. "It's not a fail-safe system, but it's miles ahead of everything else."

However, forcing E-Verify on all employers would devastate California's agricultural economy if the mandate is not coupled with another source of farm labor, Lungren said.

"You're going to destroy agriculture in a very real sense," he said. "I don't think I'm being an alarmist about that."

For more, see: California employers embrace E-Verify