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Image of Knobbley's Bark

Gall Wasp
Biorhiza pallida

Close up photo of an Oak Apple gallCLASS

Endopterygota. The wind develop inside the body of the immature insects and there is a marked change (metamorphosis) during the life cycle. The young stages are very different from the adults. The young are called larvae. The change from larva to adult form takes place during a non-feeding stage called pupa. This division is also known as the Holometabola

Photo shows the oak apple gall that grows around the larve.

Hymenoptera, Bees, Wasps, Ants. Parasites, ichneumons, sawflies etc.

Apocrita Bees, Wasps, Ants and Parasites

Cynipidae Gall Wasps

Generally all gall wasps induce the formation of galls in plants, especially in oaks. Galls are formed when the eggs, laid by the female in the plants, hatch and the tissues around the grub swell up.

The swelling of the tissues around the grubs of the Biorhiza pallida produces on the oak tree what looks like, (and hence the name) apples, (well, ish).

Close up photo of an Oak Apple gallClose up of an Oak Apple gall
5th of May 2000.







Photo of an Oak Apple gallAnother Oak Apple gall
4th of May 2000.









Photo of an older Oak Apple gall18 days later.
possibly the same gall, definitely the same tree
23rd of May 2000

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