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Contarinia subulifex

Gall midge Contarinia subulifex

Description

About 5-8 mm long (1 mm wide) outgrowths are formed on the upper side of Quercus cerris leaves. The galls occur in groups and form a “brush” from the leaf. The species has one generation per year. The larva pupates in the ground. 

Symptom

About 5-8 mm long (1 mm wide) outgrowths are formed on the upper side of Quercus cerris leaves.

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