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Q&A – What is this mass of caterpillars on my walnut tree?

Question:
What is this mass of caterpillars on my walnut tree?

Answer:
These are walnut caterpillars. They will migrate into the canopy of the tree to feed on the leaves. They can be controlled at this stage by scraping them off the bark into a container of soapy water or by using an insecticidal soap.

Related Videos:
Q&A – What are these yellow striped caterpillars on my oak tree?
Q&A – Should I use BT preventatively or wait until I see caterpillars?

Related Resources:
Walnut Caterpillars
Walnut caterpillar
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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