En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Possible webbing bark lice on oak tree

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.

Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

Friday - August 08, 2008

From: Austin, TX
Region: Southwest
Topic: Pests, Trees
Title: Possible webbing bark lice on oak tree
Answered by: Nan Hampton

QUESTION:

We live near the Center and have a large live oak tree in our yard. Recently the lower trunk has been covered with thin, white weblike material (not sure if spider web). What could this be and is it dangerous to the tree? Should I brush off with broom or try another solution? Thanks!

ANSWER:

Mr. Smarty Plants thinks that your oak tree may be infested with webbing bark lice (Archipsocus nomas). Do not be alarmed. It looks rather nasty, but isn't harmful to the tree. The bark lice, which aren't really lice, are feeding on fungi, lichens and other debris on the trunk of the tree. In other words, they are cleaning your tree and, thus, are probably beneficial to it. They produce the web to protect themselves from wind, rain and predators. Here is more information Auburn University, Texas A&M and North Carolina State University. Another related species of bark iice, Cerastipsocus venosus, also commonly occurs in Texas. Here are photos of Cerastipsocus venosus. So, let them be and thank them for the cleaning service!

 

More Pests Questions

Do white-tailed deer consume King Ranch bluestem?
October 25, 2013 - Will white-tail deer in central Texas consume King Ranch bluestem ?
view the full question and answer

Small white bugs on indoor hibiscus in Ohio
November 25, 2008 - My Hibiscus has small white bugs on the leaves with small white residue. Looks like very small pieces of white rice. This white rice is also covering the UNOPENED buds and making them fall off. It ...
view the full question and answer

Problems with iguanas in Ft. Lauderdale FL
August 04, 2009 - I live on the intracoastal waterway near Ft. Lauderdale,FL and I am having problems with iguana. They will not eat lantana or buttercups; however is there a poisonous ground cover, preferable with fl...
view the full question and answer

Getting rid of Aphids on Asclepias plants in Brea, CA.
July 23, 2012 - I grow asclepsias or MILKWEED for the benefit of Monarchs. At times I have aphids consuming the leaves. How can I destroy the aphids without harming the Monarch eggs? Thank you very much.
view the full question and answer

Failure to thrive of Lantanas
August 06, 2008 - Here at work we have 4 beautiful yellow Santanas(should I say had), the leaves have started to turn brown and no longer blooming. Appears to have a fungus or disease. Please help!
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center