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Phytoptus pyri Pagenstecher
Eriophyes pyri, Epitrimerus pyri (Nalepa)

Arachnida, Acari, Eriophyidae .

Pear leaf blister mite

Description, Biology, Life Cycle, Damage, Common Names, Images

Minute, it measures 0.16 to 0.20 mm (*) .

- 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 (*) .

[R]Common Names
DE: Birnenpockenmilbe ES: Acaro de las agallas del peral FR: Phytopte du poirier IT: Eriofide del pero PT: Ácaro das pápulas da pereira GB: Pear leaf blister mite

[R] Images

  1. Phytoptus pyri Pagenstecher (ACTA)
    Leaf galls on pear
  2. Phytoptus pyri Pagenstecher (ACTA)
    Colony on underside of leaf of pear
  3. Phytoptus pyri Pagenstecher (Coutin R. / OPIE)
    Damage to pear Galls on the peduncle and the ovary of a flower.
  4. Phytoptus pyri Pagenstecher (Cotton D. / INRA Montpellier)
    Damage on leaf of pear

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