Our local news had a segment tonight on a whining peach grower who had just half the "immigrants" as last year to pick his crop. Of course, the interviewer babe never asked him if he had raised his wages to attract more pickers.
Same thing happens here in Central Wa at the many apple orchards. Damnedest thing is that the wages aren't exactly bad, though they're seasonal: they start at something like $12/hr and provide room and board. I'd have taken that over my summers in college - but, unfortunately, English-speakers (anecdote - not a blanket judgment) tend to get harrassed out of the jobs, from what I've heard.