Tree Victim at the Wilcox/Douglas Preserve

On the same day I tried out my new backpack I came across a eucalyptus tree out of a slasher movie. If slashers were going around murdering trees.
Which maybe they are...

Video Link

After telling my husband about the tree in the video below, he told me how to kill a tree by cutting away a big ring of bark. While that isn't what's going on here, he also said he had heard about a group of people who were trying to kill off California Eucalyptus trees because they are not native.

Poking around led me to this:
BioTerror?