The orange crop in Florida has almost been wiped out by a disease call Citrus Greening. This incurable disease threatens to wipe out the entire U.S. Citrus Crop. It's carried by insects that lay eggs in the orange trees and it caused the oranges to harden and die inside.    I planted a couple Orange trees really looking forward to have fresh orange juice and both got the disease.  Most nursery that sold citrus quit selling citrus.  It's really killing all Citrus. Growers have found a workaround of sorts but it's expensive and hard to use on very large scale.  There is no cure insight. https://www.orlandosentinel.com/opinion/os-ed-bacteria-greening-hurts-florida-citrus-20170615-story.html