My Pear Tree Is Healthy But The Fruit Is Not

Question

I have picked some pears off that have just come through black

Answer 1

Here are some possibilities:

https://www.gardeningknowhow.com/edible/fruits/pear/pear-black-rot-information.htm

https://www.gardeningknowhow.com/edible/fruits/pear/pear-black-rot-information.htm

https://www.gardeningknowhow.com/edible/fruits/pear/bitter-rot-on-pear-trees.htm