Eriophyes pyri is a tiny mite that causes galls to form on the leaves of Rowan and other members of the rose family, including cultivated pear trees. The gall is seen more often than the mite which causes domed pustules on both leaf surfaces - green/yellow at first but turning brown.
On the leaves of Rowan and pear trees.
Galls are visible from late spring or summer until autumn.
The mites escape from the gall through pores on either side of the leaf to pass the winter in bark crevices.
Widespread and common in Britain.
Common in Leicestershire and Rutland.
Leicestershire & Rutland Map
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