Native Plants
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Wednesday - August 19, 2009
From: Austin, TX
Region: Southwest
Topic: Diseases and Disorders
Title: Webs on tree trunk, probably bark lice
Answered by: Nan Hampton
QUESTION:
webs on tree trunk and creeping up. See no spiders or worms. what could be. very fine, thick webANSWER:
This sounds like webs from barklice that are eating fungus and lichens on the bark of your tree. They aren't lice at all, but are insects in a group called Psocids. Although there are members of this group that are considered pests (e.g., booklice) the bark lice don't harm the tree—in fact, they are beneficial since they are cleaning up the bark. We had a question a while back about webbing on a iive oak in Austin. Here is the link to the answer where you can learn more about bark lice.More Diseases and Disorders Questions
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Trees starting to die in subdivision in Hutto, TX
May 31, 2012 - I live in Hutto Tx, in a subdivision where everyone has the 2 trees planted in the front yard. My trees have started to die, and I want to find out what kind they are to find a solution
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Problems with non-native photinia in Austin
October 07, 2013 - Hi, I live in Cedar Park, TX (Austin Suburb)and have planted a number of Photinia shrubs in various areas of my property. All about 10 months old.
The leaves are curling along their length on many...
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Loss of leaves from globe willows in Utah
July 26, 2008 - I have four globe willows that have been in my back yard for the past 6 years. For the past month they have been losing their leaves from the bottom up. We had aphids in some of our other trees and ...
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Browned foliage on Juniperus ashei in Wimberley TX
April 03, 2011 - We are in Central Texas and have native "cedar" juniper trees. One with foliage that looked brown, on close inspection, is covered with white webs. The foliage looks like it is dying. No worms a...
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