The trees were injured by some kind of field chemical overspray in the Fall of 2014. I wrote about the Orange Trees here.
They are looking better. The smaller trees seem to have recovered almost completely. The older trees have many dead lower branches.
This is what they look like today.
This is what they looked like in April of 2015.
It goes to show you that given time trees can recover from the brink of death. If someone had told me they would recover I would have said they were nuts.