British Plant Galls
@britgalls
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All about plant galls in Britain, IDs, events, information, images. Gall you need to know!
Joined January 2014
Gall of the week is caused by the tortrid moth Cydia servillana on willows Salix spp. Photos by Stewart Taylor.
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Gall of the week, one to spot in the winter, is that of the agamic generation of the cynipid Andricus inflator on oaks Quercus spp. Photo by Paul Kitchener.
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Gall of the week is caused by the gall midge Dasineura irregularis on sycamore and maples Acer spp. Photo by Roelef Jan Koops.
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Gall of the week is caused by the agamic generation of the cynipid wasp Aphelonyx cerricola, found mainly on Turkey oak, Quercus cerris, but on other closely related species as well. Sexual generation unknown. Photo by Steve McWilliam.
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Gall of the week, something to warm you up: the fungus Gymnosporangium clavariiforme, tongues of fire, on Juniper, Juniperus spp. Photo by Graham Calow
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Gall of the week is the leaf roll gall of the gall midge Dasineura kiefferiana on Chamerion angustifolium, rosebay willowherb. With a bonus butterfly (small copper). Photo by Mike Poulton.
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The New Year gall of the week is caused by a scale insect on rushes, Juncus spp. It is the tassel gall of Livia junci. Photo by Tom Higginbottom.
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Well, he did say it only weakened the host, which is a reasonable attitude I think. A few clumps on a large tree will not have a significant impact, but heavy infestation on smaller trees, such as heavily pruned fruit trees, might. Overall though not really a problem.
@britgalls I didn't think Mistletoe damaged its host plant in any way... contra what the 'Royal' garden manager told the Countryfile presenter last Sunday....It just sounded a bit of the widely held incorrect beliefs that belong in the past... So what is your take on it? 😁
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Gall of the Christmas week, well, gall causer actually, what else but mistletoe. Photos by Peter Shirley. Merry Christmas and all that you wish for in 2025, as well as good galling of course. Thanks for following.
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Gall of the week, in many people's homes at the moment, is the aphid caused gall of Sacciphanties abietis on Norway spruce, Picea abies. Once named Adelges abietis perhaps just for a couple of weeks we can call it Adelges fideles! Photographer unknown.
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Gall of the week is the rosette gall caused by the gall midge Rabdophaga rosaria on willows Salix spp. Photo by Peter Shirley
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Gall of the week is caused by the cynipid gall wasp Liposthenes glechomae on ground-ivy, Glechoma hederacea. Photo by Roelef Jan Koops.
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Gall of the week, a fine group of the agamic generation gall of the cynipid wasp Andricus quercustozae on oak Quercus sp. Not yet found in Britain this is in France. Photo by Howard Statham.
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Gall of the week is caused by the fungus Exobasidium vaccinii on cowberry, Vaccinium vitis-idaea. Known as cowberry redleaf. Photos by Mike Poulton.
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Gall of the week, one of the biggest aggregations of marble galls I have ever seen. The rabbit guard is doing its job, and so was the female Andricus kollari gall wasp when she laid her eggs.
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Gall of the week, well quite a lot of them actually, a ceremonial suit of Andricus spp. galls being worn at a carnival in Spain. Featured in the Coventry Telegraph in February 2018.
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Gall of the week is caused by the cynipid wasp Diplolepis nodulosa on roses, Rosa spp. in North America. Photo by Joe Shorthouse.
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The autumn edition of the twice yearly BPGS journal Cecidology has just been published. The UK's only publication dedicated to the subject, it is free to members of the Society, so can be yours if you join for just £10 per year. Details on the website
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