Not sure what that was in that picture but it wasn't comb and not even where the bees were kocated, I was just trying to show the fruits. Yes bees can build comb on trees or in the open but prefer protected location.
Cherilata produces a lot of flowers and I'm guessing can produce a lot of fruits if you hand pollinate it. Our tree is only a few years old and we haven't really forced it to hold alot of fruits yet.