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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 ...
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]
How to prevent oak leaf itch mite bites. PennState Extension says that eradicating the mites is difficult, as tree sprays usually don't seep into the galls where the mites hide out. Some people ...
Cola-nut galls (Andricus lignicola) on pedunculate oak, caused by a cynipid gall wasp. Galls (from the Latin galla, 'oak-apple') or cecidia (from the Greek kēkidion, anything gushing out) are a kind of swelling growth on the external tissues of plants.
Rust mite, Aceria anthocoptes Eriophyes cerasicrumena, galls on cherry Aceria fraxini, galls. 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 ...
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]
The hatching larvae nourish themselves with the nutritive tissue of the galls, in which they are otherwise well-protected from external environmental effects. The host plants, and the size and shape of the galls are specific to the majority of gall wasps, with about 70% of the known species parasitizing various types of oak, inducing oak galls ...
Dryocosmus dubiosus is an abundant species of cynipid wasp that produces galls on oak trees in California in North America. [1] [2] Commonly known as the two-horned gall wasp, the wasp oviposits on the leaves and catkins of coast live oaks and interior live oaks. [1] After the eggs hatch, the resulting gall form looks like it has a set of bull ...