Keep in mind not all produce can be picked with automation. On another note: if people are looking for work here is a great place for them to work, Might be a good place to get a job, start a union be represented by a lobby and make a few bucks until you retire.
Where there's a will, there's a way. For instance, citrus growers use tree shakers when slave labor isn't available. Grapes can be grown on special trellises that allow automation. I'm sure big cotton never thought there would be automation either (not that I'm comparing you to Big Cotton).
Start a union?
Unions suck.