Anthonomus pedicularius (Linnaeus, 1758)
Crataegus monogyna, Dronten, two galled flowers in the inflorescence © Arnold Grosscurt
opened gall with young pupa
Crataegus monogyna, Zwolle, 8.v.2018 © Arnold Grosscurt: opened gall with larva
Larvae and pupae in the flower buds. The buds remain closed, turn brown, often drop off.
Crataegus laevigata, monogyna.
That the species would live also on Pyrus, as Buhr writes, is not confirmed by Dieckmann.
Buhr (1964a), Colonnelli, Osella & Cornacchia (2011a), Delbol (2013a), Dieckmann (1968a), Knutelski (2001a), Lehmann & Hannover (2016a), Redfern & Shirley (2011a), Rheinheimer & Hassler (2010a), Roskam (2009a), Tomasi (2014a).