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Entomology (Study of Bugs)/Help I.D. Tiny Green Worms Infesting/Killing my Weeping Cherry

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Green worms on Leaf
Green worms on Leaf  
Hi,
Thank you for taking time to help provide me with any and all information regarding the dozens upon dozens of little green worms or caterpillars that are swiftly killing my Weeping Cherry in front of our home.  I live in Centreville, Virginia, USA.  hope you are able to view the image I've attached and that it helps in identifying this insect.  Most of our tree is brown and dead and what is still green is covered in these worms.  Is there any way to kill these and save our tree?  Can these insects get into our home since the tree is up against our concrete steps leading into our front door?
Thanks so much in advance for your help!

Kristin

Answer
Hi Kristin
These are moth caterpillars but I cannot tell you what kind from these photos because they change as they mature. If I were there to look at your tree I could tell you more My identification does not solve your problem anyway. Spray the leaves with a pyrethrum based spray. If more of them still hatch spray them again..If this does not work you may have to consult a tree expert. Be careful when you choose someone to  treat your tree.
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Entomology (Study of Bugs)

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Walter Hintz

Expertise

I can answer any questions about insects and spiders.

Experience

I have taught science for over 57 years. I am presently teaching biology at the college level. I have done extensive graduate work in entomology.

Publications
Momentum Magazine The Ohio Journal of Science

Education/Credentials
B.S. In Ed Kent State Unuv M.Sc The Ohio State Univ National Science Foundation Fellowships: Electron Microscopy Univ of California Entomology Kent State Univ

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