Damage on trunk of lime tree

Question

Is this just damage or is it an infestation of something? Will it repair itself?

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Answer 1

It is difficult to tell. Check the tree for any other problems (on the leaves/branches/fruit)- if there are other problems, it is more likely that this is an infestation of a disease. See if it matches the symptoms of any of the diseases discussed in these articles:

http://ipm.ucanr.edu/PMG/C107/m107bptrunkrootdis.html
https://cals.arizona.edu/pubs/diseases/az1154/#phyto

You may also need to consult a local expert, like an arborist or local extension agent.