Cacopsylla pyri

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Cacopsylla pyri adult female
Author: Daniel Buckhardt, Naturhistorisches Museum, Basel
Source: Psyllidkey
Cacopsylla pyri
Author: Mick E. Talbot
Source: Wikimedia Commons

Cacopsylla pyri (Linnaeus, 1761) - (pear psyllid)

The psyllid is an important pest of pears in Europe and transmits the pear decline disease caused by `Candidatus Phytoplasma pyriˊ. It develops through 5 nymphal stages within a period ranging from a few weeks to several months, depending on the temperature. There are 3 generations per year in central Europe and up to 6 in the Mediterranean region.

The adult is around 3 mm long, brownish with glassy wings. There are 2 colour forms. The summer form is light brown with a small dark spot at the base of the forewings. The winter form is darker, larger and with a brownish band on the forewing base.

Vernacular names
• Deutsch: Gemeiner Birnblattsauger
• English: pear psyllid
European pear psylla
• Español: psila del peral
• Français: psylle commmun du poirier

See also the related species Cacopsylla pyricola which has a similar biology.

Synonyms:
Psylla piri
Psylla pyri