From the Wall Street Journal:
Arizona-style immigration bills are under attack in several states, with some of the strongest opposition to the proposals coming from agricultural interests like the cotton and peach farmers here in central Georgia.
Farmers in states from Florida to Indiana are pressuring—and in some cases persuading—state politicians to rethink proposed legislation that would authorize crackdowns on illegal immigration. They argue that the legislation will drive Mexican workers out of their states, and that there aren't enough American workers willing to pick crops. They want legislation at the federal level, which wouldn't favor one state over another.
At least 25 states are weighing proposals to crack down on illegal immigration and employers who hire them, according to the National Conference of State Legislatures. Arizona law allows police to check the immigration status of people they stop, and establishes stiff penalties for businesses or individuals who hire illegal immigrants.
For more, see: Immigration Bills Rile Farmers