Identification: are these lichens on my tree barks?

Updated my post with some more clear photos.

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

DNSC 6328-DNSC6331 are photos of my pear tree. The white stuff looks slightly different from the ones on my apple and prune trees (shown in the remaining photos). 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

 

Hi MeowMeow,

I see several things on the bark in your photos, some I cannot see clearly, but some is certainly crustose lichen. Most of the white patches. Lichen normally occurs on bark, some species are associated with specific kinds of trees. Lichen is not harmful to your trees.

I also see some mosses or liverworts in your photos, also normal and not harmful to your trees.
There are a few things that might be fungal, I can't tell from the distance of the photos.
Burl-growths on trees can have different causes: Sometimes a virus or fungus can be the cause, but a tree specialist would have better information for you on this.

I hope that is helpful,
frog

 

Your pic at lower left shows horizontal cracking that is quite wide. I've never seen that. Don 't know what that could be, but it may have been some recent stress or damage, like too much weight on it or against it.

Most of the other pics with the little fissures or cracks in the bark look normal if your sap is still running. That's likely just the tree growing a little too tight for its coat of bark. My trees did this in February, but as I recall, it's a bit cooler in your latitudes. Sometimes significant changes in available water could cause rapid expansion, but you'd have a lot of other noted problems too.

I agree with frog as above. And I thought your original photos were asking about the galls. Some appeared to be from injury or pruning, while others could be more problematic. I'd expect if your trees blossom and fruit, the production will be okay and the fruits palatable.