I just love the claims about the farming industry. This claim basically says that Americans cannot function without mexicans and other South American nation's illegal immigrants. I take this as a slap in the face to all my countrymen.
There is this thing called a free market economy. To those that claim the prices will skyrocket, I say so be it. Better put,as a great man once said, bring it on. When lettuce is overpriced people will just buy something else. When fruits cost too much the market will see the sales fall and thus their profits.
Folks that "need" all these illegals will seal their own fate by rising costs, if they rise to high. I offer it is high time to set this issue straight and stop the illegal employment that so stains what our market is supposed to be.
Americans can and will do the jobs. When the fair market is actually fair and there is no lopsidedness in the scale. Illegal labor tips the scale and that has got to stop.
If at all possible, I would rather avoid a recession, though, from your proposed "market" correction.