European red mite
is mainly a pest of fruit trees (apple, pear, plum and cherry). However, it can attack a large scale of other woody plants and is occasionally a problem [...] Rosaceae grown in greenhouses. It originates from Europe (as can be seen from the common name, European red mite) but is now distributed in all important [...] leaves but moves to upper leaf surfaces when the lower side becomes crowded. Contrary to the two-spotted spider mite , Tetranychus urticae , it does not