Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Pin Oak Infestation 
Name: Lisa W.
Status: educator
Age: 30s
Location: N/A
Country: N/A
Date: 2001-2002
Question:
I have several pin oaks that have bare branches. On these bare branches are circular brown balls about 2.5 inches in diameter and it appears to be killing the trees. I broke one open and there were tiny insects and grubs inside. Do you know what this is, will it destroy the trees, and is there a way to get rid of them?

Replies:
You found some insect galls.

Possibly helpful:

http://www.bugwood.org/vermont/

http://www.msue.msu.edu/msue/imp/mod03/01701260.html

http://www.ca.uky.edu/entomology/entfacts/ef408.asp

Anthony R. Brach, Ph.D.


Click here to return to the Botany Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs

NEWTON AND ASK A SCIENTIST
Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory