Category Archives: Galls

Looking down 2

Under some of the oak trees on campus, as well as the fallen leaves, tiny pale discs are appearing. Sometimes these are present in large numbers. They show up particularly well on tarmac pavements. These are button galls which were … Continue reading

Posted in Animals, Fagaceae, Galls, Insects, Plant Pathology Research Group | Tagged , , , , , , | Leave a comment

Ideal home or revolting distortion?

If you need a safe place to live, why not get a home built to your own specifications? That’s what the larvae of Dasineura sisymbrii, a kind of gall midge do. The presence of the larvae amongst the developing flower buds … Continue reading

Posted in Brassicaceae, Flowering Plants, Galls, Insects, Plant Pathology Research Group, Plants | Tagged , , , | Leave a comment

Marble galls on oak

Early autumn is a great time to go looking for galls. Most have had time to develop but those on leaves are still on the trees for easy spotting. Two of the larger galls on oak are Knopper galls and … Continue reading

Posted in Fagaceae, Flowering Plants, Galls, Insects, Plant Pathology Research Group | Tagged , , , | Leave a comment

Under attack!

Holm oak (Quercus ilex) is a Mediterranean tree species that was introduced to Britain in the 1500s. Unlike our native oak species, Holm oak is evergreen and holds its leaves all year round. It’s latin name, ilex, refers to the fact … Continue reading

Posted in Animals, Fagaceae, Flowering Plants, Galls, Lepidoptera, Moths, Plant Pathology Research Group, Plants | Tagged , , , , , , , | 1 Comment

Smothered in white

White blister rust is a disease that is mis-named as it is not actually caused by a rust fungus. The perpetrator is an oomycete. This group have traditionally been included in the fungi and have long been studied by mycologists … Continue reading

Posted in Brassicaceae, Flowering Plants, Galls, Plant Pathology Research Group, Plants | Tagged , , , , | 2 Comments

Orange pustules 2

Most fungi prefer warm and moist conditions so it’s not surprising that fungal pathogens are harder to find on plants in winter. A pathogen that is common on campus at the moment is Puccinia malvacearum, the Hollyhock Rust. This occurs … Continue reading

Posted in Flowering Plants, Fungi, Galls, Malvaceae, Plant Pathology Research Group | Tagged | Leave a comment

Spangle leaf-manglers: Neuroterus spp.

If you’ve spent any time admiring the variety of oaks (Quercus spp.) on campus, you may have noticed strange growths on various parts of the trees. During last week’s Vegetation Survey and Assessment session, I came across a badly affected … Continue reading

Posted in Animals, Fagaceae, Galls, Insects, Plants | Tagged , , , , , , , , , , | Leave a comment