Low skill jobs--including, but not limited to--farming field labor, where long growing seasons occur. The types of manual labor jobs which Americans forgo in order to collect welfare benefits.
Of course... I know Florida well enough by now to know it is a very agricultural state! Illegal "migrant" farm workers... of course.
We get migrant farm workers here in Connecticut in the spring, summer and early fall... our "growing season". We have lots of tobacco (and other) crops here. I'm pretty sure these "migrant workers" are illegal - they all speak Spanish, and are most likely Mexican or from other countries in South America. It's damn scary to go into grocery stores at lunchtime that are located near the tobacco fields during the growing season here.