Viburnum Shrub Has Green Moss-Like Substance Killing Leaves Quickly

Question From: INDIANA
Q: I have "green stuff" looks like thin green moss spreading on the branches of my viburnum shrub; it is spreading like wild fire and killing every leaf on the bush rapidly. What is it? What should I do..... The shrub is 19 years and 6 months old. Please help....daze and confused.

A: You need to get an onsite inspection from a certified arborist. Go to tcia.org and enter your zip code. Best Nancy.