Wasps have taken a great liking to my apples ( Katja and Discovery).I have sprayed them with ‘Bug Clear for fruit and veg’.It does’nt appear to be working very well, can you recommend anything else ?
If the product is safe to use, it follows that it will only kill what it hits and the few wasps that are present.
It is a waste of time to spray. The only way is to take away the damaged fruit on which the wasps feed as soon as you see it.
Or take your share of the bounty as you need it and leave their share to the wasps.