Maggots/caterpillars in apples

[Bumblingbroccoli]

I picked a load of Katy Apple's yesterday only to discover quite a few had small slightly orange looking maggots or caterpillars in the core. Exteriors had a small hole. What are they and how do I prevent them next season?

The tree is an espalier if that is useful to know. I have a Lord lamborne but they are not ready so not sure yet if there will be same issue.

Thanks in advance for any advice...

[Jungle Jane]

It could be codling moth larvae? There’s a link here about them & another link from this forum with info on making some DIY traps & interesting info -

Codling moth - additional information - Apple Best Practice Guide

https://www.growfruitandveg.co.uk/gr...rms_55005.html

[Bumblingbroccoli]

Thanks I have looked more closely and suspect you're right. Will take a look at links for good on prevention... really annoying as harvest good this yr