Nettle Leaf Galls
by Dr Keith Wheeler/science Photo Library
Title
Nettle Leaf Galls
Artist
Dr Keith Wheeler/science Photo Library
Medium
Photograph - Photograph
Description
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.
Uploaded
November 24th, 2019
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Viewed 520 Times - Last Visitor from Ottawa, ON - Canada on 04/20/2024 at 3:47 PM
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