Gall

Definition

Abnormal growths on plants or trees caused by various parasites, such as insects, mites, nematodes, fungi, and bacteria, in response to their feeding or egg-laying activities.

Etymology

Derived from Old English 'galla', meaning 'bile'; in this context, it refers to abnormal swellings on plants induced by parasitic activities.

Example

The oak gall wasp induces the formation of galls on oak trees, which provide a habitat and food source for the wasp larvae.

Synonyms

• Plant tumor
• Cecidia

Related Terms

• Parasitism
• Insect-plant interaction
• Oak gall wasp
• Cynipid wasps

Usage Notes

Galls are highly specific to the parasite and host plant species, often providing a distinctive structure that can be used for identification.