Nettle leaf galls

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Nettle leaf galls

Nettle leaf galls, artwork. Four views of galls at the base of a stinging nettle leaf (Urtica dioica). These abnormal outgrowths are caused by the parasitic larvae of the nettle gall midge (Dasineura urticae). The larvae emit a chemical which stimulates growth and then they feed on the juices and tissue produced inside the gall cavity. A slit in the top of the gall provides an exit point. Each gall generally contains one larva. A gall may contain more than one larva (as shown in the cross-section, bottom right), indicating that the gall midge larva itself has become a victim of a endoparasitoid

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 6292407

© DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Abnormality Cross Section Damage Damaged Developing Development Diagram Diseases Drawing Endoparasitoid Gall Galls Growth Larva Larvae Parasite Parasitic Parasitism Pathogens Pathology Quartet Stinging Nettle Urtica Dioica Abnormal

EDITORS COMMENTS
This print showcases the intricate world of nettle leaf galls, offering four distinct views of these peculiar formations found at the base of a stinging nettle leaf (Urtica dioica). Created by the parasitic larvae of the nettle gall midge (Dasineura urticae), these abnormal outgrowths are a result of a fascinating symbiotic relationship. The larvae emit a chemical that stimulates growth, enabling them to feed on the nourishing juices and tissue produced within the gall cavity. To ensure their survival, an exit point is provided through a slit in the top of each gall. While typically housing one larva per gall, this quartet reveals an exceptional cross-section where multiple larvae coexist, indicating that even these parasitic insects can fall prey to endoparasitoids. This artwork not only captures nature's complexity but also serves as an illustration for various scientific fields such as botany, zoology, entomology, and pathology. The image invites us into a microscopic realm where biology unfolds before our eyes. It highlights both beauty and damage caused by parasites while shedding light on diseases affecting plants. As we delve deeper into this visual representation of growth and development intertwined with parasitism and pathogens, we gain insight into the delicate balance between organisms in our natural world.

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