Oak Apple Gall

Biorhiza pallida

  1. Wildlife
  2. Galls
  3. Oak Apple Gall


The Oak Apple Gall is caused by a tiny gall wasp, Biorhiza pallida. It can be found between May and June on oak twigs where the female has laid her eggs in the leaf bud. Inside the gall there are a number of chambers, each housing a larva which eats its way out. Adults emerge in June and July.

How to identify

The Oak Apple Gall is a large, rough, buffish-brown, apple-like gall found on oak twigs.

Where to find it



When to find it

  • May
  • June

How can people help

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Species information

Common name
Oak Apple Gall
Latin name
Biorhiza pallida
Diameter of gall: up to 5cm
Conservation status