During the last two years of drought, our lemon tree had a hard time - it lost a lot of leaves and was quite sick. After a lot of love it is now well on the way to recovery, however, it has suffered an attack of lemon tree borers.

Now I have rid the tree of borers, and it has been a month or two without new holes, so I think we are ok there.

I am wondering though, what can be done to help the lemon tree to heal the holes left behind by the borers? Is there something I can plug the hole with that will encourage the tree to heal?

thanks!