A reddish disc-shaped gall that forms on the undersides of oak leaves in response to the developing larva of a gall wasp. It results from eggs laid in the summer and alternates with the currant gall within the annual cycle.
虫瘿
The wasp is Neuroterus quercusbaccarum, family Cynipidae
Example sentencesExamples
I've seen few oak galls, especially the various spangle galls, though Knopper Galls have still been fairly common around London.
Oak spangle galls are cup shaped and are also produced by a gall wasp.
Parasitic wasps lay their eggs in leaves, twigs and buds causing galls such as the spangle gall and oak apple.
Numbers of spangle galls decreased in larger tree populations possibly due to larger numbers of insect parasitoids.
In autumn flat spangle galls form on the back of leaves, the leaves fall and females emerge next spring.
Definition of spangle gall in US English:
spangle gall
noun
A reddish disk-shaped gall that forms on the undersides of oak leaves in response to the developing larva of a gall wasp. It results from eggs laid in the summer and alternates with the currant gall.
虫瘿
Example sentencesExamples
Parasitic wasps lay their eggs in leaves, twigs and buds causing galls such as the spangle gall and oak apple.
Numbers of spangle galls decreased in larger tree populations possibly due to larger numbers of insect parasitoids.
In autumn flat spangle galls form on the back of leaves, the leaves fall and females emerge next spring.
I've seen few oak galls, especially the various spangle galls, though Knopper Galls have still been fairly common around London.
Oak spangle galls are cup shaped and are also produced by a gall wasp.