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Tag Archives: galls on Ash

K is for Knopper

16 Saturday Dec 2023

Posted by sconzani in insects, plants, trees

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Tags

British galls, bug galls, galls, galls on Ash, galls on Hazel, galls on oak trees, galls on Poplar, galls on willow, galls on Yew, Knopper gall, midge galls, mite galls, wasp galls

This is really a review of the galls I’ve found this year but the letter G simply had to be about my first ever confirmed Goshawk sighting, so K is for Knopper is my alternative lead in.

231216 Knopper Andricus quercuscalicis

Knopper galls, like the one shown above, did feature in one post this year, Acorns and galls on 1 October, but there were many other galls, most of which were new finds for me. February saw the year off to a good start with galls on Yew trees caused by a tiny midge (Galls: Taxomyia taxi, 9 February) and galls on Hazel caused by an equally tiny mite (Galls: Phytoptus avellanae, 20 February). In June, it was a small bug that was creating eye-catching galls on the leaves of an Ash tree (Galls: Psyllopsis fraxini, 12 June), and, in July, aphids were the gall causers on a Poplar tree (Galls: Pemphigus spyrothecae, 17 July). In that October blog Acorns and galls I mentioned above, as well as the knoppers, another tiny wasp had caused artichoke galls to form on the same Oak tree. And, a couple of weeks later, I found my final new galls for the year, those caused by midges on Willow trees (Galls: Rabdophaga rosaria, 17 October). All in all, 2023 was quite a galling year!

231216 mixed galls

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Galls: Psyllopsis fraxini

12 Monday Jun 2023

Posted by sconzani in insects

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Tags

British bugs, British galls, gall, galls on Ash, Jumping plant louse, Psyllopsis fraxini

There is a place locally I call the secret field because it has just a couple of quite well-concealed entrances and very few people visit it – in fact, of the many local people I know there’s only one who knows this place. It is surrounded by large mature trees, which means the location is quite sheltered, and the field itself seems to have been planted with saplings perhaps 10-15 years ago, judging by their size. This secret field is where I make many of my most interesting discoveries, and this is one of the most recent.

230612 psyllopsis fraxini on ash (1)

These are galls on the leaves of Ash trees (upper leaf above, lower leaf below) caused by the larvae of a small bug called Psyllopsis fraxini, also known as the Jumping plant louse according to the Naturespot website, though I’m not sure that’s an official name. There are, apparently, three species of this Psyllopsis bug whose larvae cause galls like these so when recording such finds the aggregate name is used, Psyllopsis fraxini agg. You can read more about these wee beasties and see photos of the adult on the British Bugs website here.

230612 psyllopsis fraxini on ash (2)

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About me

sconzani

sconzani

I'm a writer and photographer; researcher and blogger; birder and nature lover; countryside rambler and city strider; volunteer and biodiversity recorder.

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