Well, that's what you get with monoculture!

I'm not familiar with that disease or virus but I wonder if this Citrus sudden
death is an exotic invasive. With the increase in world trade more exotics are
threatening native forests. Here in Michigan the concern is over Emerald Ash
Borer, just identified last year, which has the potential to decimate all
native ashes similar to what dutch elm disease did to elms. It has already
killed or doomed almost all of the ashes in three counties in SE Michigan.