DENVER, March 3 — As migrant laborers flee Colorado because of tough new immigration restrictions, worried farmers are looking to prisoners to fill their places in the fields.

In a pilot program run by the state Corrections Department, supervised teams of low-risk inmates beginning this month will be available to harvest the swaths of sweet corn, peppers and melons that sweep the southeastern portion of the state.

Under the program, which has drawn criticism from groups concerned about immigrants’ rights and from others seeking changes in the criminal justice system, farmers will pay a fee to the state, and the inmates, who volunteer for the work, will be paid about 60 cents a day, corrections officials said.

Concerned about the possible shortage of field labor, Dorothy B. Butcher, a state representative from Pueblo and a supporter of the program, said, “The workers on these farms do the weeding, the harvesting, the storing, everything that comes with growing crops for the market.”