There is a web-type coating on the limbs of one of our Valley Oak trees. It has never happened in the 12 years we have lived here. It looks like a sleeve of webbing, thin and solid, starting at the trunk and going up several limbs. We have four trees spread out, and only one has this issue. It has been there for about two weeks and is starting to get less. What might it be, and is it bad for the tree?
This is likely an insect called a leafroller that created the webbing. If this is the case, it has probably completed it's life cycle. If you see this next year, you can treat with insecticides, including organic products, such as insecticidal soap. You can also click here to have one of our arborists come out and take a look.
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