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Pyemotes herfsi, also known as the oak leaf gall mite or 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 bites humans, causing red, itchy, and painful wheals (welts). The mites are barely visible, measuring about 0.2–0.8 ...
Any larvae in the gall are paralyzed with the mite's venom, which is strong enough to paralyze prey 166,000 times the mite's size, PennState Extension says. ... How to treat oak leaf itch mite bites.
Aceria mackiei, previously Eriophyes mackiei, the live oak erineum mite, is an abundant eriophyoid mite that produces leaf-blister galls on coast live oak, interior live oak, huckleberry oak, and canyon live oak. [1] This mite's ability to induce galls in oaks of both the black oak group and the intermediate oak group is unique. [1]
Although it usually feeds on oak leaf gall midge (Polystepha pilulae) larvae and other insects, the oak leaf gall mite ("itch mite") (Pyemotes herfsi) becomes an ectoparasite of periodical cicada eggs when these are available. After cicadas deposit their eggs in the branches of trees, feeding mites reproduce and their numbers increase. [60]
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.
Polystepha pilulae, the oak leaf gall midge, is a species of gall midge in the family Cecidomyiidae. [1] [2] [3] It is found in eastern North America. [4]
Eriophyes laevis is a gall mite which makes small, pimple-like galls on the leaves of alder (Alnus species). The mite was first described by the Austrian zoologist, Alfred Nalepa in 1889 and is found in Europe and North America.
Maple spindle-gall mites spend the winter as free-living mites under loosened bark and around wounds. In early spring, they induce gall formation by feeding on leaf buds. The resulting blisters expand into hollow structures as the leaves grow. Asexual reproduction occurs within the galls, with mature mites emerging in late June to mid-July.