Posted by Sundew on 14-01-2019 14:37
#5
I shall check our
Artemisia and
Achillea populations in this regard. In
https://bladminee...a-misella/ it is stated that only the first generation produces stem galls, whereas the larvae of the second live in the flower heads without causing galls. The galls depicted in
https://www.pflan...a44opt.jpg are not very conspicuous...