Explore Plants

Share

Ask Mr. Smarty Plants

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

Search Smarty Plants
    
 

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
15 ratings

Thursday - August 21, 2008

From: Palo Cedro, CA
Region: California
Topic: Non-Natives
Title: Fungus on trunk of non-native weeping willow in California
Answered by: Barbara Medford

QUESTION:

I live in Palo Cedro, CA and have a weeping willow tree with with what appears to be be some type of fungus growing all over the trunk of the tree. It is a brown color and can be broken off in big chunks. It is not part of the tree or root system. Could you please give me your opinion on what it is and if there is anything I can do about it? It is about 20 feet tall and about the same distance wide. It is a beautiful and healthy tree aside from this problem. Thanks for any help you can give. Don

ANSWER:

We found a couple of plant diseases that particularly seem to like members of the genus Salix, or willow. The particular willow you have, of course, is not native to North America, but to China and is Salix x sepulcralis. Willows are weak wood and disease prone, fast-growing but short-lived. At the Lady Bird Johnson Wildflower Center, we promote the use and propagation of plants native to North America. In this particular case, it probably doesn't matter if the plant is native or not.

The two diseases that we found that we believe fit the description of symptoms that you gave us are Crown Gall  (University of Maine Pest Management Labs) and Canker (Iowa State University Extension site on Fast Growing Trees).

Images of Canker on willows

Images of Crown Gall

From the description you gave us of the problems your tree was having, we would say the best thing to do is get it down and disposed of before the disease can spread to other plants in the area. If you prefer, you might have a trained arborist look at it, and see if it's worth the effort to try to save it.

 

More Non-Natives Questions

Replacing yellow bells with hibiscus from San Antonio
July 03, 2012 - Help! Will the roots of the yellow bells keep sprouting if I've removed the shrub? I'm replacing it with a hibiscus shrub. Will it do well in the same spot where the yellow bells were?
view the full question and answer

Need suggestions for a privacy screen besides Murray Cypress.
October 18, 2011 - Mr. Smarty Plants, I live in NE TX, about an hour east of Dallas on I-20. I hear interstate traffic behind my house, and have a busy street on its left side, and a school adjoining in back. I thi...
view the full question and answer

Plants native to South Florida and the Caribbean
June 22, 2007 - What are the plants native to South Florida and the Caribbean?
view the full question and answer

Can bastard cabbage be eaten from Austin
May 02, 2013 - On a local cooking show they were talking about cooking local foods and mentioned bastard cabbage but never showed how to cook it or if it was in fact edible. Would be a way to help get rid of it if ...
view the full question and answer

Non-native Empress trees in Beaumont TX
September 26, 2009 - I want to grow some Empress Trees in our yard. We have a huge yard and it is right on the corner of a cross street where they have just put a traffic light. People stopped at the light can see into ...
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.