Teri,
An aphid tree is not a specific species of tree but one that is 'infested'
with aphids. The aphids feed on the plant juices and produce a sugary
exudate. (Park your car underneath one of those trees and you know what we
are talking about!).
The exudate is collected by bees (and other insects, including wasps) and
utilized as 'nectar' source. The resulting product is called honeydew.
In Europe, honeydew has been a priced product for centuries. Some regions
are reknown for their honeydew.
regards,
Paul van Westendorp [log in to unmask]
Provincial Apiculturist
BC Ministry of Agriculture,
Fisheries & Food