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Aceria ilicis causes felt-like galls (erinea), which are a patch of glandular hairs, caused by gall mites of the family Eriophyoidea. The bulge is 2–3 mm high on the upperside of the leaf of holm oak (also known as evergreen oak) and the depression below is several mm wide; there are usually several on a leaf.
Eriophyidae is a family of more than 200 genera of mites, which live as plant parasites, commonly causing galls or other damage to the plant tissues and hence known as gall mites. About 3,600 species have been described, but this is probably less than 10% of the actual number existing in this poorly researched family.
Eriophyes is a genus of mite that forms galls, mainly on the leaves of deciduous plants. Some are called blister mites. The blue butterfly Celastrina serotina has been reported to feed on these galls and also on the mites, making it one of the uncommon carnivorous Lepidoptera. [1] Whereas other mites have four paired legs, Eriophyes have only ...
Aceria is a genus of mites belonging to the family Eriophyidae, the gall mites.These tiny animals are parasites of plants.Several species can cause blistering and galls, including erineum galls. [1]
Eriophyes laevis makes small, more or less, pimple-like galls, up to 2 mm in diameter. They can cover most of the leaf which can restrict growth. Each gall has a narrow opening on the underside of the leaf. The galls are green at first but usually become purple or red later in the year.
The mite itself is microscopic. However, it is visible through the gall that it produces. Unlike its close relative, the maple bladder-gall mite, the galls produced by the maple spindle gall mite are not rounded, but rather elongate. While unsightly to some, they do not cause major damage to the maple trees themselves, and don't often distort ...
Pyemotes herfsi, also known as the oak leaf gall mite or the oak leaf itch mite, is an ectoparasitic mite identified in Europe and subsequently found in India, Asia, and the United States. The mite parasitizes a variety of insect hosts and is able to bite humans, causing red, itchy, and painful wheals (welts). The mites are barely visible ...
Typically, galls are 2–3 millimetres (0.079–0.118 in) in diameter, and may be numerous on the upper surfaces of leaves. [1] They have an opening in the lower surface. At first they are yellowish-green or bright red, later they become dark red and black. [2] In Britain, the mite affects introduced silver maple.