What are galls on plants?

Galls on plants are indeed characterized by the swelling of plant parts. These abnormal growths can occur on various parts of the plant, including leaves, stems, flowers, or roots and are usually caused by the interaction of pathogens, insects, or environmental factors.

When certain insects, like aphids or wasps, feed on or lay eggs in plant tissue, they can trigger the plant's defensive response, resulting in the formation of galls. This response often leads to localized growth and swelling, which can serve as a protective space for the insect or pathogen, encapsulating it within a gall.

Understanding galls is essential for managing plant health and assessing the effects of pests or diseases on crops since they can influence overall plant vitality and productivity.