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What is in this fallen oak branch?

This is an insect called a twig pruner. The larvae is making tunnels in the branch and then bores away the wood in a circle causing the branch to fall. This is not a major problem and you do not have to spray. Just pick up the fallen branches and throw them in the trash. That will keep the larvae from becoming adults to continue the cycle. 

Related Videos:
​Tree Holes and Borers
​Tree Borers

Related Resources:
Fallen oak shoots may be work of the twig pruner
Twig Girdler and Twig Pruner
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  • Home
  • Watch
    • TV Schedule
    • Full Episodes Online
    • How-to and Informational
    • Questions and Answers
    • This Week in the Garden
    • Garden Notes
  • Garden Topic Collections
    • Apple Trees: How-to and Information
    • Peach Trees: How-to and Information
    • Tomatoes: How-to and Information
    • Square Foot Garden Blog
  • Resources
    • Soil Testing
    • Extension Publications
    • Gardening Resources
    • Blogs
    • Organic Gardening
    • Articles
    • Privacy
  • Guests
  • Contact Us
    • Ask a Gardening Gardening Question
  • Search