Alder psylla, Psylla alni

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Alder psylla, Psylla alni

Alder psylla, Psylla alni, adults, and nymphs covered in waxy secretions on leaves. Handcoloured lithograph from Georg Friedrich Treitschkes Gallery of Natural History, Naturhistorischer Bildersaal des Thierreiches, Liepzig, 1842

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Media ID 23208104

© Florilegius/Mary Evans

Adult Alder Bildersaal Friedrich Gallery Georg Naturhistorischer Nymph Pest Thierreiches Treitschke Secretions Waxy

EDITORS COMMENTS
This striking handcoloured lithograph depicts the Alder Psylla, Psylla alni, a small sap-sucking insect belonging to the family Psyllidae. The image captures both the adult and nymph stages of this insect, covered in waxy secretions that protect them from predators and desiccation. The Alder Psylla is a common pest found on alder trees (Alnus spp.) and can cause significant damage to the leaves, stunting their growth and reducing the tree's overall health. The intricately detailed illustration is from Georg Friedrich Treitschke's Gallery of Natural History, Naturhistorischer Bildersaal des Thierreiches, published in Leipzig in 1842. Treitschke was a renowned German naturalist and publisher who produced high-quality scientific illustrations of various plants and animals. This particular print showcases the exceptional artistry and precision of the time, with each insect meticulously rendered in vibrant colors. The Alder Psylla's waxy coating, visible in the illustration, is a defensive mechanism that helps the insects blend in with the leaves and protects them from environmental stressors. The nymphs, which resemble tiny, wingless adults, can be seen clustered on the undersides of leaves, while the adults have developed wings for mobility. This historical print not only offers a fascinating glimpse into the natural history of the Alder Psylla but also showcases the exquisite artistry and scientific precision of the 19th century. The intricate details and vibrant colors bring the insects to life, making this an essential addition to any collection of natural history or entomology prints.

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