Q.Something Odd On My Pear Tree Leaves.
I found some odd looking attachments under some of my pear tree leaves. Not knowing what they are I have removed the offending leaves and disposed of them. What are these attachments please?

Certified GKH Gardening Expert
I believe this to be one of many caterpillars known as the Stinging Moth Caterpillar (One of several Megalopygidae species). There are many remedies, from predatory insects, to natural methods. I would recommend these. Azadirachtin is one of my personal favorites. This is the active ingredient of Neem oil.
This article will help:
https://www.gardeningknowhow.com/plant-problems/pests/insects/prevent-caterpillars.htm