Aphids & Wasp Problem
You need to spray the tree to get rid of the aphids and the wasps. We can supply an Insect Killer Spray to take care of this and this should kill them both.
Can I also suggest you put up a Wasp Trap in the tree to catch the wasps.
If there is a nest in the tree then you will need to get a professional pest controller out to kill and remove it for you.
Hope this helps and that you avoid getting stung in the meantime.
Lynn Burton - Horticultural Adviser