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Trigonaspis synaspis
Gall wasp Trigonaspis synaspis
Description
It has two alternating generations. The sexual generations develops in unilocular, 5–6 mm long bud galls, regularly found on older shoots and branches. Adults emerge in May/June. The asexual generation forms a globular (5–6 mm in diameter) leaf gall on the upper surface. It is green when young, later gets reddish and brown. The adults of this generation emerge late autumn/early winter.
Symptom
Small brown galls on the underside of the leaves.
Tree Species: Oak
Part of a plant- attacked: Leaf / Needle
Pest significance: Less harmful
Pest Category: Insects
Present in EU: Yes
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Location map: Trigonaspis synaspis
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Last observations
There are a total of 2 observations of the species in the system
Trigonaspis synaspisGall wasp Trigonaspis synaspis
milan
Number of votes: 0
Published: 5.8.2025
Trigonaspis synaspisGall wasp Trigonaspis synaspis
Marián Slamka
Number of votes: 0
Published: 27.3.2025
Similar damage
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Common spangle gall
Gall midge Dryomyia circinans
