Psylla alni (Linnaeus, 1758)
Alnus incana, Hungary, Kimle, 23.iv.2018 © László Érsek
wax and honeydew
after the was has been partially removed
mature larva, after all wax has been removed
same larva, ventral
5th instar larva (from Ossiannilsson, 1992a)
Larvae on young shoots in the leaf axils. They are hidden under a copious amount of shining-white wax-wool. Older larvae are marked with black. Univoltine; hibernation as egg.
Alnus glutinosa, hirsuta, incana, japonica, viridis.
ovipostion inside a bud. This requires perforation of the bud scales, resulting in a small necrotic spot (Lauterer, 1976a).
Abras, Fassotte, Chandelier & Cavelier (2008a), Baugnée, Burckhardt & Fassotte (2002a), Buhr (1964b), Burckhardt (1983a, 2002a), Conci, Rapisarda & Tamanini (1992a), Hellrigl (2004a), Hodkinson (1989a), Hodkinson & White (1979a), Jerinić-Prodanović (2010a), Lauterer (1976a), Lauterer & Dorow (2010a), Malenkovský & Lauterer (2012a), O’Connor & Malumphy (2011a), Ossiannilsson (1992a), Ouvrard, Burckhardt & Cocquempot (2015a), Seljak (2006a), Serbina, Burckhardt & Borodin (2015a), White & Hodkinson (1982a).