Hylesinus fraxini (Panzer, 1779)
ash bark beetle
on Fraxinus, etc.
“bark rose” (from WSL.CH)
parasite
In spring the female bores a horizontal gallery in the bark, depositing a series of eggs, each one in a separate chamber. The emerging larvae then each make a short vertical gallery from their egg chamber. Before she can oviposition the female goes through a period of maturation feeding. She the bores in the green bark of a young tree. Repeated infections by a number of females may induce cankerous swellings, called bark roses. Monogamous species.
host plants
polyphagous
Ailanthus; Fagus sylvatica; Fraxinus angustifolia & subsp. oxycarpa, excelsior, pennsylvanica; Juglans regia; Malus domestica; Olea europaea; Quercus robur; Robinia pseudoacacia; Syringa vulgaris.
phenology
Univoltine.
distribution within Europe
synonyms
Leperesinus fraxini; Hylesinus, Leperisinus, varius (Panzer, 1799).
references
Buhr (1964a), Compte (1981a), Dauphin & Aniotsbehere (1997a), Duffy (1953a), Lombardero (1995a), López Romero, Romón Ochoa, Iturrondobeitia Bilbao & Goldaracena Lafuente (2007a), Lukášová & Zimová (2015a), Marković & Stojanović (2015a), Mifsud & Knížek (2009a), Munroe (1926a), Nikulina, Mandelshtam, Petrov, ao (2015a), Roskam (2019a), Schedl (1980a).