What’s black and bumpy, white and woolly, and appears on trees in spring? We found this odd combination of surfaces in Franconia, New Hampshire. Extra points if you can explain why they appear close together.
Answer
Woolly aphids and sooty mold. These tiny, tufty white aphids appear en masse on twigs and stems in early spring. They suck sap and, as part of their digestive process, secrete honeydew – a sugary liquid. Sooty mold grows in honeydew.
This week’s contest winner was Roslyn Fine