Ips cembrae, known generally as larch bark beetle or eight-toothed larch bark beetle, is a species of typical bark beetle in the family Curculionidae. Its habitat is Euro-Siberian, ranging from sea level to sub-alpine.[2] It was first recorded in Great Britain in 1955.[3] Populations were said to be found in Japan and China, but further research determined that those were actually Ips subelongatus.[4]
The insect measures around 5mm and has a dark brown to black colour. The species is considered hard to distinguish visually from Ips typographus.[4]
As a pest
Ips cembrae is native to most of its habitat and is considered less of a pest risk than Ips typographus.[1] The beetle mainly affects the European larch, Larix decidua, especially during periods of drought.[3][5] Besides damage from digging tunnels, the beetle also spreads fungi between trees.
Parasites
The species can be infected by several nematodes: Contortylenchus, Parasitylenchus, Cryptaphelenchus, and Parasitorhabditis endoparasites, Micoletzkya under the wings as phoretic parasites. Laimaphelenchus and Bursaphelenchus are found in the frass.[6]
References
1 2 EPPO/CABI 1997. "Ips typographus". In: Quarantine pests for Europe, 2nd edn. Ed. by Smith, I.M.; McNamara, D.G.; Scott, P.R.; Holderness, M. CABI, Wallingford.
↑ Grodski, Wojciech. "Ips cembrae Heer (Col.: Curculionidae, Scolytinae) in young larch stands–a new problem in Poland." Forstschutz Aktuell 44 (2008): 8-9.
1 2 Crooke, Myles; Bevan, D. (1957). "Note on the First British Occurrence of Ips Cembrae Heer (Col. Scolytidae)". Forestry: An International Journal of Forest Research. 30: 21–28. doi:10.1093/oxfordjournals.forestry.a063092.
↑ Hougardy, Evelyne, and J-C. Grégoire. "Biological differences reflect host preference in two parasitoids attacking the bark beetle Ips typographus (Coleoptera: Scolytidae) in Belgium." Bulletin of entomological research 94.4 (2004): 341-347.
↑ Grucmanová, Š., Holuša, J., Čermák, V., & Nermuť, J. (2015). Nematodes associated with Ips cembrae (Coleoptera: Curculionidae): comparison of generations, sexes and sampling methods. Journal of Applied Entomology, 140(5), 395–403. doi:10.1111/jen.12269
Further reading
Crooke, Myles, and D. Bevan. "Note on the first British occurrence of Ips cembrae Heer (Col. Scolytidae)." Forestry 30.1 (1957): 21–28.
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