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Biorhiza pallida
Oak apple gall wasp
Description
Wingless females (asexual generation) hatch in early spring, already in February. They lay eggs on twigs even at a temperature of around 0º C. When laying eggs, they give rise to the creating of a specific potato-like gall. In the gall live together several larvae. In summer, the larvae pupate inside the gall. Males and females (some of them winged, the other ones wingless) of the sexual generation hatch in July. After mating, the females lay eggs on oak roots where the asexual generation is developed in 5 mm long red crown galls.
Symptom
A spongy formation on a twig in which several larvae live.
Tree Species: Oak
Part of a plant- attacked: Branch
Pest significance: Less harmful
Pest Category: Insects
Invasive Species: No
Present in EU: Yes
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There are a total of 7 observations of the species in the system
Biorhiza pallida Oak apple gall wasp
Anonymous contributor
Number of votes: 0
Published: 22.9.2025
Biorhiza pallida Oak apple gall wasp
AK73
Number of votes: 0
Published: 30.5.2024
Biorhiza pallida Oak apple gall wasp
AK73
Number of votes: 0
Published: 30.5.2024
Biorhiza pallida Oak apple gall wasp
majo
Number of votes: 0
Published: 4.5.2024
Biorhiza pallida Oak apple gall wasp
Marián Slamka
Number of votes: 0
Published: 8.12.2023
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