Fungi forum: are these lichens on my tree barks?

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Name: Meowmeow
Vancouver, bc (Zone 8b)
Meowmeow
Jul 21, 2016 10:55 PM CST
http://forums.botanicalgarden.ubc.ca/threads/are-these-liche...

Photos r in the above link
I just notified there is some gross looking stuff (some kind of fungus?) on my apple, prune and pear trees.

Are they all lichens?

Are they causing my tree barks to crack?

Will they harm my trees and can I still eat the fruits from these trees?

Thank you


Thank you
[Last edited by Meowmeow - Jul 22, 2016 3:47 PM (+)]
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Name: stone
near Macon Georgia (USA) (Zone 8a)
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stone
Jul 22, 2016 7:07 AM CST
I visited the page... And...
Really need some more details... What specifically is bothering you?
I see normal discoloration of the bark, the trees just grow that way...
I also see some limbs that were removed with stubs remaining... Also saw some knots on the tree... Which might also be a result of limb removal, or maybe from gall insects.... Which really is not a problem to the tree.
Name: Kat Enns
Castlegar British Columbia, Ca (Zone 5b)
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KatEnns
Jul 22, 2016 11:44 AM CST
Yes, that is a series of different crustose lichens, and a few liverworks, and at least two mosses on your tree bark. It is a symbiotic epiphytic community, and it doesnt hurt the tree. If you don't want it there, you can use a mild bleach solution but remember that the lichen on the bark actually protects the bark a bit from wear and tear.
K. A. Enns
Name: Sue Taylor
Northumberland, UK
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kniphofia
Jul 22, 2016 9:43 PM CST
What I would give to have a tree encrusted with lichens! They are an indicator of pure air, and do no harm to the host tree at all. Why do you describe them as "gross looking"? I think they are fabulous.
Name: Kat Enns
Castlegar British Columbia, Ca (Zone 5b)
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KatEnns
Jul 23, 2016 7:30 AM CST
kniphofia said:What I would give to have a tree encrusted with lichens! They are an indicator of pure air, and do no harm to the host tree at all. Why do you describe them as "gross looking"? I think they are fabulous.
Thank you for mentioning this. For many years I used lichen chemical analysis to indicate how much pollution their was around industrial sites. So its nice to know someone appreciates how much they contribute to our understanding of the effects of air pollution on biota. The crustose ones are really beautiful, especially up close. Great to photograph.

K. A. Enns

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