Help with Pear tree decease ?

Hi All. I have a problem with my 11 year old pear tree. The tree has in the past has given us a vast amount of fruit each year. This year it only has fruit on one side. The other side is riddled with some kind of decease like black spot as photo. Any help / guidance
would be grateful
Thank you.

 

A common problem with pears is the presence of small black spots on the leaves. These are called “pear leaf blisters” or simply “leaf spots”. They usually appear on one side of the tree only, but they may spread from branch to branch. Found this site it might help…

1. Pear Tree Diseases And Treatment: Diagnosing And …
   https://igrowplants.net/2020/11/22/pear-tree-diseases-and-tre…

i always use milk and water for leaf spot and it works on many plants and last year my red robin had leaf spot milk and water got rid of it but got no pear tree so dont know if it would work on pear trees but you could try it if you wonted

 

Thanks Janet, worth a try, Link does not appear to work.

Loofah, No weed killer used.

 

@Wildcat see Pear blister mite

 

Hi the link works ok for me sorry it dont for you v but it seems comp have there own mind wether they wont to work or not lol

 

The line in bold works the link below takes you to page not found.
Also bear in mind it is an American website, so tailored for American conditions, also soometimes things are recommended that are not available in the UK.

 

Sorry did not know

1. Prevent, identify and treat pear tree pests and diseases in ...
   www.gardenfocused.co.uk/fruitarticles/pears/pest.php
   In autumn, as the leaves of pear trees are dying, spores are released from the rust infection into the air. If they are to survive winter they must find another plant which retains its leaves over winter. The rust spores in the UK have developed so that they are able to survive on juniper trees and bushes. Severe case of Pear Rust