Arachnida, Acari, Eriophyidae .
Description, Biology, Life Cycle, Damage, Common Names, Images
- Host plants: pear and, occasionally, apple.
- The adults spend winter in colonies which may reach about fifty individuals under the scales of the fruit or vegetative buds. In spring, they invade still rolled up young leaves.
- By their feeding, they cause "pear tree erinosis", characterised by the formation of small projecting galls on both sides of the leaf (*) .
First light green (*) , at times red, the coloration of these galls becomes brown and finally black. The underside of the leaves is lined with hypertrophied hairs sheltering the adults, the eggs and the nymphs.
- 2 annual generations. The 1st, and the most harmful, appears end of April-beginning of May; the 2nd, beginning of June. As soon as mid-summer, the females return to their overwintering resting places.
- The attacked tissues canker and, in serious cases, the leaf dries up and drops. The floral parts are sometimes attacked; the fruits become deformed and drop prematurely (*) .
HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.