What is the white frothy substance on my Pittisporum?
I have a large, well-established and otherwise healthy pittisporum tree. I've noticed over the summer that there is a white frothy substance coming out of one place on the bark. It has quite a strong smell, a bit like a solvent, and seems to have been very attractive to wasps and flies. There is also a small amount of resin coming from the bark in several other places.
- 5 Oct, 2009