Ips cembrae

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]

Ips cembrae
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Infraorder: Cucujiformia
Family: Curculionidae
Genus: Ips
Species:
I. cembrae
Binomial name
Ips cembrae
Heer 1836
Distribution map of Ips cemrae[1]

The insect measures around 5 mm 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 affect the European larix, 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 nematode parasites: Contortylenchus, Parasitylenchus, Cryptaphelenchus and Parasitorhabditis endoparasites, Micoletzkya under the wings as phoretic parasites. Laimaphelenchus and Bursaphelenchus are found in the frass.[6]

References
  1. EPPO/CABI 1997. Ips typographus. In: Quarantine pests for Europe, 2nd edn. Ed. by Smith IM, McNamara DG, Scott PR, Holderness M, CAB International, Wallingford.
  2. Grodski, Wojciech. "Ips cembrae Heer (Col.: Curculionidae, Scolytinae) in young larch stands–a new problem in Poland." Forstschutz Aktuell 44 (2008): 8-9.
  3. 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.
  4. Jeger, Michael; Bragard, Claude; Caffier, David; Candresse, Thierry; Chatzivassiliou, Elisavet; Dehnen‐Schmutz, Katharina; Gilioli, Gianni; Jaques Miret, Josep Anton; MacLeod, Alan; Navajas Navarro, Maria; Niere, Björn; Parnell, Stephen; Potting, Roel; Rafoss, Trond; Rossi, Vittorio; Urek, Gregor; Van Bruggen, Ariena; Van Der Werf, Wopke; West, Jonathan; Winter, Stephan; Kertész, Virág; Aukhojee, Mitesha; Grégoire, Jean‐Claude; Grégoire, J. C. (2017). "Pest categorisation of Ips cembrae". EFSA Journal. 15 (11): e05039. doi:10.2903/j.efsa.2017.5039. PMC 7009832. PMID 32625339.
  5. 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.
  6. Grucmanová, Š., Holuša, J., Čermák, V., & Nermuť, J. (2015). Nematodes associated withIps 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


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