Aphanostigma piri (Cholodkovsky, 1903)
Aphids tiny (< 1 mm), yellow, globular, wingless. The live on young branches, leaves, buds and fruits (mainly around the remnant of the calyx, where they can cause necrotic spots). Hibernation as egg.
Pyrus communis & subsp. pyraster.
Baggiolini (1975a), Barbagallo, Binazzi, Pennacchio & Pollini (2011a), Blackman & Eastop (2017), Lampel & Meier (2003a).