Tree disease identification

[Crick21]

Can anyone help us identify this growth on the trunk/branches of trees around the garden? It is taking control of certain trees, rendering them lifeless this year. Any help with identification would be appreciated, and any suggestions as to a remedy would be brilliant. Thank you.

 

[Chuck]

Nature and pollution: what lichens tell us about toxic air | Natural History Museum

www.nhm.ac.uk

 

[zigs]

Welcome to the forum

Whatever killed the tree isn't the lichen that is now growing on the dead branches, it's just a coincidence that it's colonized it afterwards.

 

[Marck]

Greetings, welcome to the Forums.

What a beautiful orange lichen, both lignicolous and foliose. It may be Xanthornina parietina, or something similar.

Lichens are a diverse group of fungi that live on various substrates in symbiosis with photosynthetic algae living within their tissue.
Lichens are not parasitic to the trees on which they grow.

Many lichen are sensitive to air pollution, and a survey of the types of lichen able to grow at a given site may be used to estimate pollution levels. How wonderful that your air is clean enough to have these intriguing organisms in your garden.