It is a form of juniper pear rust, caused by a member of the genus Gymnosporangium. Here's a good pic of an .

Here is a link that might be useful: Juniper pear rust

Thanks Susanc. NOt what I wanted to hear but that looks like the creepy culprit. Conflicting info on whether to remove either pear or juniper, or leave be as the damage is done. Any ideas?

i think you may have missed the last sentence at the link above:

Or put up with the spots and the occasional damaged fruit.

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unless you are in the production biz of pears... exactly what is the problem???

other than it is bugging the heck out of you.. lol

not everything has to be fixed!!!

if it were me.. i would make sure that all leaves from the pear are removed after leaf fall.. OFF THE PROPERTY ...

and then i would revel in the thought that i have a habitat that includes many things.. other than a pear and a juniper ...

once you begin 'treatment' of one thing.. most likely you will impact other things ...

and if you remove one of the trees.. you will end up with mushrooms.. will those need to be treated also ... ????

to avoid chems or treatments in the garden.. one must develop a more zen attitude about exactly what is a problem.. that requires action ..

most likely.. this doesnt .. IMHO .. and i would end up with a few less pears than you.. given the same tree .. which once the tree matures.. you will be putting them in unlocked cars at the mall because you have 2 billion of them ....

actually.. if you have enough wine or beer.. and start contemplating the actual beauty of the fungi .. and its symbiotic relationship between two diverse species .... you really start to marvel at the world we live in ... and then a few beers later.. you fall asleep ... and have pleasant dreams about fungi ....

ken