File:Sycamore leaf with galls and tar spot fungus - geograph.org.uk - 919089.jpg
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editDescriptionSycamore leaf with galls and tar spot fungus - geograph.org.uk - 919089.jpg |
English: Sycamore leaf with galls and tar spot fungus These galls, turning red at the tips, are created by the mite Aceria macrorhynchus. The females overwinter in crevices in the bark, emerging in spring to feed on the new leaves. Where they feed, galls develop (each mite can be responsible for many galls). In contrast to the conspicuous structures seen here on the upper surface of the leaf, the corresponding locations on the underside of the leaf are just tiny holes, fringed with hairs; the mites use these holes to gain access to the galls, and lay their eggs in them in May. The developing larvae feed on the tissues that line the galls. This process does not appear to be harmful to the tree.
The black patches are unrelated to the galls; they are caused by Tar Spot fungus, Rhytisma acerinum. Though it can appear unsightly, it also does no real harm to the tree in moderation; it only reduces the amount of leaf surface available for photosynthesis. |
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Source | From geograph.org.uk |
Author | Lairich Rig |
Attribution (required by the license) InfoField | Lairich Rig / Sycamore leaf with galls and tar spot fungus / |
InfoField | Lairich Rig / Sycamore leaf with galls and tar spot fungus |
Camera location | 55° 57′ 19″ N, 4° 34′ 41″ W ![]() ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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Object location | 55° 57′ 19″ N, 4° 34′ 45″ W ![]() ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Lairich Rig and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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Attribution: Lairich Rig
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current | 00:11, 22 February 2011 | ![]() | 640 × 480 (102 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Sycamore leaf with galls and tar spot fungus These galls, turning red at the tips, are created by the mite Aceria macrorhynchus. The females overwinter in crevices in the bark, emerging in spring to |
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