What disease is this on my apple trunk?

[Colleen7]

un

Zone 6b
Coastal ma
Espalier from Monrovia

[marknmt]

Burr knots - not a disease. Search on this forum and you will find good discussions about them.

https://growingfruit.org/search?q=Burr%20knots

[Colleen7]

Relieved thank you.