Hi Jerry, Tom etc.,
I've been trying to look at Maggie's photos of the gall but my computer is being
obstruse and won't let me open it! The erineum could be caused by Aceria ilicis
but there is also recorded Aculops coulteri. To separate them certainly would
require ID of the mites, which none of us in the BPGS has done. So we probably
can't identify the species with certainty.
Redards,
Margaret


Quoting THOMAS HIGGINBOTTOM <thomas.higginbottom@...>:

> Hi Jerry,
> Many thanks for the observation. I have looked through French, Dutch and
> Hungarian books looking for something like your description. Hope you don't
> mind I thought it might be a good idea to copy your email to Margaret Redfern
> who is one of the authors of the 'Keys'.
> Regards,
> Tom
> jrclough2 <jrclough2@...> wrote:
> I've noticed galls on a Holm Oak in Kidwell's Park, Maidenhead.
> These
> are small raised pimples (2-3 mm, above leaf dorsal surface) with what
> I assume is an erineum on the ventral surface (rusty brown hairs).
> Unfortunately no photos. I assume that this is likely to be Aceria
> ilicis.
>
> If anyone is interested in the location the oak is located by the
> subway under the A4 just next to the roundabout junction with the
> Marlow Road (A308), approx grid ref. SU 885 812.
>
> Jerry Clough
>
>
>
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>