Bryobia rubrioculus Scheuten Apple pear bryobia mite

This widely distributed mite (Fig. 343) is associated with fruit trees, including apple, cherry, pear and plum; infestations, which may also occur on related ornamentals, rarely occur on sprayed trees. The mites feed mainly on the upper surface of the leaves. They also congregate in masses on the bark of shoots and branches whilst moulting from one stage to the next, especially in late May and June, August and September. The greyish-white cast-off skins remain in situ and are a useful clue to the presence of this pest. There are usually two or three generations each year, and this species overwinters in the egg stage. Aggregations of harmless oribatid mites on the bark of trees are sometimes mistaken for bryobia mites (see p. 270).

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