galls

Oak apple or oak gall is the common name for a large, round, vaguely apple-like gall commonly found on many species of oak. Oak apples range in size from 2 to 4 centimetres (1 to 2 in) in diameter and are caused by chemicals injected by the larva of certain kinds of gall wasp in the family Cynipidae. The adult female wasp lays single eggs in developing leaf buds. The wasp larvae feed on the gall tissue resulting from their secretions, which modify the oak bud into the gall, a structure that protects the developing larvae until they undergo metamorphosis into adults.

Oak apple or oak gall is the common name for a large, round, vaguely apple-like gall commonly found on many species of oak. Oak apples range in size from 2 to 4 centimetres (1 to 2 in) in diameter and are caused by chemicals injected by the larva of certain kinds of gall wasp in the family Cynipidae. The adult female wasp lays single eggs in developing leaf buds. The wasp larvae feed on the gall tissue resulting from their secretions, which modify the oak bud into the gall, a structure that protects the developing larvae until they undergo metamorphosis into adults.

This gall is caused by a wasp which only lays its eggs on white oak trees.

This gall is caused by a wasp which only lays its eggs on white oak trees.

These galls are made by wasps laying eggs in leaf buds.

These galls are made by wasps laying eggs in leaf buds.

The southern chorus frog (Pseudacris nigrita) is a species of frog in the family Hylidae, endemic to the southeastern United States. Its natural habitats…

Acericecis ocellaris, known generally as ocellate gall midge, is a species of gall midges in the family Cecidomyiidae. Other common names include the…

Hello Gardeners, I’m Amanda McNulty with Clemson Extension and Making It Grow. Galls are abnormal plant tissue growths and can be caused by a variety of…