An excrescence of any form produced on any part of a plant by insects or their larvae. They are most commonly caused by small Hymenoptera and Diptera which puncture the bark and lay their eggs in the wounds. The larvae live within the galls. Some galls are due to aphids, mites, etc. See Gallnut.
An abnormal growth of tissue formed in response by the tree to an attack by certain insects, fungi, bacteria etc
an abnormal swelling of plant tissue caused by insects, microorganisms, or external injury
an abnormal outgrowth caused by infection or irritation by certain fungi or bacteria
A pronounced localized swelling of greatly modified structure that occurs on plants from irritation by a disease or insect.
(syn. tumor) abnormal swelling or localized outgrowth, often roughly spherical, produced by a plant as a result of attack by a fungus, bacterium, nematode, insect, or other organism
Abnormal growth on a plant produced by irritation or injury.
outward, abnormal growths, seen sometimes on shrubs and trees and caused by bacteria or pest irritation.
a tumorlike swelling of plant tissues induced by the development of another plant or an animal (including an insect).
swelling of plant tissue in reaction to feeding by insects or mites; usually found on leaves but may also occur on other plant parts.
an abnormal growth caused by the attack of a pest or disease organism
A pronounced swelling or outgrowth on a plant.
An abnormal plant growth, swelling or tumor induced by another organism such as an insect.
an abnormal growth or swelling of plant tissue, caused by stimuli external to the plant itself, generally by insects such as the gall wasp and gall midge ; sometimes by bacteria, parasitic fungi or other diseases of the plant.
A deformation of plant tissue caused by the actions or secretions of insects or fungi.
a growth caused on plants of various kinds by parasitic mites (Phytoptidae)
a lump or a bump or a wart on a plant that is stimulated by an insect to create a food source and safe haven
a more or less spherical overgrowth or swelling of plant cells
an abnormal development or outgrowth of plant tissue resulting from an irritation caused by bacteria, fungi, or insects
an abnormal growth caused when an insect - in this case a small wasp Andricus quercuscalis - inserts its ovipositor into the tissue of the plant in order to lay its eggs
an abnormal growth of plant tissues caused by the stimulus of a disease or insect
an abnormal growth on a plant or leaf that is stimulated by the presence of insect eggs in the plant's tissue
a nodule that grows on a plant in reaction to the presence of certain sorts of microbes and insects
an overgrowth or swelling in plant tissues usually resulting from insects or diseases
a plant structure formed by abnormal plant tissue growth
a pronounced excrescence of greatly modified woody tissue that appears on tree branches or stems
A swollen part of a plant, because an insect larva (baby insect) is living inside it. Some species of wasps and flies inject their eggs into plant stems or leaves. The plant keeps growing, forming a ball-shaped gall around the egg. When the larva hatches, it eats its way out. Sometimes galls hurt the plant and sometimes they don't.
Galls can occur on any part of the plant, including its roots. They can be any number of colors or shapes, but are recognizable as a tumor-like growth. The plant creates the gall as a response to a virus, bacteria, fungus, or sucking insects. In the case of an insect, plant tissue grows around the insect, supplying it with food (and, incidentally, protection). In return, the insect will sometimes keep to the tissue offered, rather than attacking tissue vital to the plant's health. Unfortunately, of course, the pest population could be large or the disease might spread, which outpaces the plant's ability to feed it. To control gall, cut and destroy infected tissue, leaves, or stems. Gall resistant plant varieties are also available.
A pronounced, localized swelling with greatly modified tissue structure, evoked on plants as a response to irritation, by a foreign organism. A plant tumour. ( BCFT).
A swelling or growth produced by plant in response to insects, fungi, or other organisms.
In branches, roots, and stems, an abnormal localized growth, generally seen as a large knob of undifferentiated woody tissue.
The bulbous growths that form on the leaves and twigs of trees in response to attack by parasites; collected from oak, oak-apple and pistachio trees. Depending on the source, they can be amorphous in shape (Japanese and Chinese galls); large, smooth and globular (British and American oak galls); or small, round and spiky (Aleppo galls). See image below. They contain gallotannic acid, which, combined with iron (II) sulfate in aqueous solution, produces a greyish-black ink that further darkens as it oxidizes.
An abnormal growth on a plant, usually induced by an insect that lives within the gall.
Outgrowth or swelling of unorganized plant cells produced as a result of attack by bacteria, fungi, or other organisms.
An abnormal growth of plant tissue caused by stimuli external to the plant itself, generally caused by insects or parasitic bacteria. Example: Phylloxera gall.
Abnormal proliferation of plant tissue, stimulated by insects, pathogens, or abiotic influences.
A swelling on the plant twig, trunk or roots.
A localised proliferation of plant tissue caused by the irritation of bacteria, fungi, mites, or insects. These are the odd bumps and swellings seen on stems and leaves. Winsop in the Ojibwe.
An abnormal plant structure formed in response to parasitic attack by certain microorganisms (bacteria, fungi, viruses) or insects. Galls may develop either by localized cell proliferation or increase in cell size. ( 16)
Galls or plant galls are proliferations and modifications of plant cells and can be caused by various parasites, from fungi and bacteria, to insects and mites. Galls are often very organised structures and because of this, the cause of the gall can often be determined without the actual agent being identified. This applies particularly to some insect and mite galls.