Help, I have Black marks on the trunks on my olive trees, what do I do?

Hi Amanda,

Please help, we are based in the Hunter Valley and it appears that where moisture runs through the tree is where the problem is (see pictures). It doesn’t look like sooty mould but we had scale and olive lace bug issues. The trees are in urgent need of care. What is the black on the trunks and what do I do? P NSW