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Plant Diseases/Japanese Maple fungus?

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Question
Japanese Maple Disease
Japanese Maple Disease  
I live south of Atlanta GA and was concerned my two year old Japanese maple, which should be putting on new growth, didn't appear to be showing any color at all. I examined it and discovered a lot of thin, whitish (moldy looking) tendrils on the branches and trunk.
Is this a mold or an insect problem and how serious is it?

Thanks a lot!

Larry

Answer
Larry:

Carefully remove a few of these "tendrils" and look for a tiny hole in the bark where the tendril originates.  If you see a very tiny hole, this may be evidence of ambrosia beetle, a boring insect that can attack many thin barked trees.  "Google" ambrosia beetle to see these tendril like structures.  I do not recognize these structures as a disease organism.  There is a lot of information on the internet about this critter.

Steve

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Dr Stephen Vann

Expertise

Plant Diseases and Disorders of Lawn Grasses, Trees, Vegetables,and Ornamentals

Experience

Plant Diseases Identification and Management

Education/Credentials
B.S. Botany --- Miss. State Univ. M.S. Plant Pathology --- Miss. State Univ. Ph.D. Plant Pathology --- Texas A & M Univ.

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