What is swollen plant tissue, often insect or mite induced, called?

The term that refers to swollen plant tissue, often induced by insects or mites, is "gall." Galls form in response to the activities of certain organisms, such as specific types of insects or mites, which stimulate the plant's cells to grow abnormally. This results in the characteristic swelling that is often unique to the species of the organism causing it. The plant tissue becomes a protective habitat and a food source for the gall-forming organism, showcasing a fascinating interaction between plants and insects.

Understanding galls is important in arboriculture and plant health management since they can indicate the presence of pests, and their presence may stress the plant. Knowing the different types of plant responses to pests can help in diagnosing plant health and taking appropriate management actions. The other terms, while related to different aspects of plant and growth structures, do not specifically describe the gall's unique characteristics or formation process.