Psyllopsis fraxini (Linnaeus, 1758)
on Fraxinus
Fraxinus excelsior, Dronten © Arnold Grosscurt
Fraxinus excelsior, Lienden, Mars © Leo Blommers
Fraxinus excelsior, Duin en Kruidberg; young larva, with white wax excretions
Fraxinus excelsior, Belgium, prov. Liège, Flémalle-Haute; © Jean-Yves Baugnée
older larve, with well-developed pigmentation
parasiet
Oviposition on a terminal leaf bud; two generations, both causing leaf galls; hibernation as egg on the bark of the host plant. The larvae are dark.
host plants
Oleaceae, monophagous
Fraxinus angustifolia subsp. oxycarpa, excelsior, ornus.
In his list of Psylloidea host plants, Burckhardt (2002a) mentions F. excelsior only.
notes
P. fraxini is, at least in northwestern Europe, the commonest of a group of species that all cause identical galls on ash. For an identification of these Psyllopsis species a microscopical examination of the larvae or the male genitalia is required.
references
Abras, Fassotte, Chandelier & Cavelier (2008a), Baugnée, Burckhardt & Fassotte (2002a), Béguinot (2001c, 2002a,d,h, 2003a, 2005a, 2006c, 2007a,b, 2012a), Bellmann (2012a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Braggion (2013a), Buhr (1964b), Burckhardt (1983a, 2002a), Burckhardt & Freuler (2000a), Chinery (2011a), Cogolludo (1921a), Conci, Rapisarda & Tamanini (1992a), Dauphin & Aniotsbehere (1997a), Flügel (2016a), Hellrigl (2004a), Hodkinson (2009a), Hodkinson & White (1979a), Houard (1909a), Jerinić-Prodanović (2010a), Kollár (2007a, 2011a), Koops (2013a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon & Romain (2009a), Lambinon & Schneider (2004a)m Lauterer & Dorow (2010a), Lehmann & Hannover (2016a), Malenkovský & Lauterer (2012a), O’Connor & Malumphy (2011a), Ossiannilsson (1992a), Ouvrard, Burckhardt & Cocquempot (2015a), Redfern & Shirley, 2002a), Roskam (2009a), Seljak (2006a), Stănescu (2009a), Sylvén (1960a), Tomasi (2003a, 2012a, 2014a), White & Hodkinson (1982a).