Aceria fennica (Lindroth, 1899)

on Betula

gall

purplish red to almost whitish erineum consisting of cylindrical hairs. The erinea are hypophyllous and are situated mainly near the leaf margin; the corresponding upperside of the leaf is discoloured and bulging.

hostplants

Betulaceae, narrowly monophagous.

Betula nana.

synonyms

Eriophyes fennicus.

references

Buhr (1964b), Houard (1908a).

mod 28.v.2018