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Cynips longiventris

Striped pea gall wasp

Description

The unisexual generation induces monolocular globular galls 8-10 mm in diameter on the lateral veins of the under side of the leaves. The gall has a characteristic pattern of white stripes or spots against a pale green or red background. Mature galls are quite hard. The bisexual generation develops in inconspicuous 2-3 mm long egg-shaped bud galls. The preferred food plant is Quercus robur, but this species can occasionally be found on Q. petraea.

Symptom

The gall has a characteristic pattern of white stripes or spots against a pale green or red background.

Tree Species: Oak

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes

Seasonal frequency of occurrence

Seasonal frequency of occurrence