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Re: [british_galls] Galls on Holm Oak (Quercus ilex), Maidenhead
Hi Margaret,
In 2004, I emailed the pics of the Holm Oak galls to John Smeathers and he said that they could be Aceria ilicis but to keep the specimens for him till next time we met, so that he could identify the mites. Well I parcelled up the galls as per instructions but I haven't seen him since and I guess that I must have discarded all but one very dried up specimen [any mites that initially survived have most likely turned to dust by now!]. I could ask Gareth to see if he can find new specimens on the holm oak at the Bot. Garden this year, so that someone can have another go at identifying the mites.
Subject: Re: [british_galls] Galls on Holm Oak (Quercus ilex), Maidenhead
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
> 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@yahoo.co.uk> 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 > > > > >
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...
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...
Re messages from Tom, Maggie and Jerry re Aceria ilicis - I just thought it would be interesting to see what we have in the database for this species. There...
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...
Hi Jerry, We found these galls on a Holm oak in the Leicester Uni Botanic Garden in 2004. I have put 3 pics in my "Maggie's Galls" photos. Hope they are of...
Hi Margaret, In 2004, I emailed the pics of the Holm Oak galls to John Smeathers and he said that they could be Aceria ilicis but to keep the specimens for him...
Hi Maggie, I am glad John Smeathers is back in the fold and willing to ID mites for us. It's probably best to send specimens straight away when fresh, although...
Maggie, again, These look very like Aceria ilicis erinea. I understood from the description that the new galls were more of a pimple above and less extensive...
... description ... below. But ... Thanks everyone for all the feedback. Margaret is exactly right about the galls I have seen: discrete, dorsal surface of...
... about ... conspicuously ... is ... have a ... Another update: I have found galls very much closer to Maggie's pictures at two new locations: just N of...
I enclose a link to a set of scans of several leaves from two trees, the one in Kidwell Park (SU 885 812), and one by Maidenhead Bridge (SU 900 813). I have...
Hi Jerry, I've had a look at your pics - they are a bit dark [have you tried brightening them slightly in Photoshop Elements?]. The only leaves that seem to...
Thanks Maggie for your cogent points. 1. I will fiddle with the pictures in Photoshop and re-post better versions. I wanted to get as many of the leaves I'd...
Hi Jerry, I'm riding on the back of this message because my computer had gremlins earlier this afternoon. Did you email me about the BPGS Invertebrates...
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