Hello Jules,

I would need some photos of your trees if you'd like some specific disease management suggestions.  

If you'd like you can send photos of:

- top and bottom of leaves

- affected fruit

- affected areas of bark

- close up and far away

Otherwise here is some basic information for tending pear trees that you may find helpful.

https://extension.umn.edu/fruit/growing-pears

https://extension.illinois.edu/fruit-trees/pears

I hope this helps.  If you decide to send photos, feel free to open this thread again and I'll be happy to help!

Thanks,