Quote:
Originally Posted by rangersarah2  Thanks Jason. Would the first sign of the knopper gall wasp be the change in the acorn? How does the wasp that creates an oak apple make it's 'apple', and how does the one that creates a robin's pincushion make that one? |
It isn't the insect that lays the egg that 'makes' the galls, but the effect of the egg (possibly) and the developing larvae. I don't think anyone is sure quite how this happens, and why gall shapes are so varied, but presumably the larvae excrete a chemical that provides them with this protection.
henrya