My large pine trees have blue-green scales on their trunks and branches, along with a silver coating on their boughs, which has spread to my Rose of Sharon bushes. Can you diagnose this and recommend treatment options?
I suspect the feathery silver coating on the branches is pine bark adelgid, which is an insect pest. I am not sure of the blue/green scales: this is likely and harmless lichen or algae growing on the bark. Contact us to make an appointment and we can likely verify the causal agent.
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