Bark beetle

  • Latin name: Crypturgus pusillus (Eichhoff)
  • French name:
  • Family:
  • Synonym(s): Bostrichus pussilus ,
    Bostrichus aphodiodes ,
    Crypturgus pusillus (Gyllenhal),
    Crypturgus cribrellus ,
    Crypturgus atomus ,
    Crypturgus cylindricollis ,
    Crypturgus danicus ,
    Crypturgus gaunersdorferi ,
    Crypturgus maulei ,
    Crypturgus parallelocollis
Description

Distribution in Canada

New Brunswick, Nova Scotia, Prince Edward Island, Newfoundland and Labrador, Quebec and Ontario.

Distribution elsewhere in the world

United States: Connecticut, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Pennsylvania, and Rhode Island.

Germany, Austria, Belarus, Belgium, Cyprus, Korea, Denmark, Spain, Estonia, Finland, France, Italy, Latvia, Luxembourg, Norway, Netherlands, Poland, Portugal, Czech Republic, Romania, United Kingdom, Slovakia, Slovenia, Sweden and Turkey.

Micro-habitat(s)

Bark, Wood

Damage, symptoms and biology

Crypturgus pusillus is considered a “secondary” bark beetle since it attacks trees that have previously harboured other bark beetle species such as Ips typographus and Pityogenes chalcographus. It very rarely attacks live trees. It is a commensal organism (“commensal” refers to the “sharing of food”). In Europe, the insect is associated with at least 15 fungi in the Ophiostomatoid group, such as Ceratocystiopsis alba, Ceratocystiopsis minima, Ceratocystiopsis minuta, Ceratocystiopsis leucocarpa, Graphium pseudormiticum, Ophiostoma ainoae, Ophiostoma araucariae and Ophiostoma piceae.

Other information

Crypturgus pusillus originates from the Palaearctic region (Europe, Asia and North Africa). It was introduced into the eastern United States in 1868, New Brunswick in 1910, Nova Scotia in 1911, Prince Edward Island around 1976, and Newfoundland. It may have been introduced on imported lumber.

Canadian Forest Service Publications

Bark beetle

Information on host(s)

In Europe

Abies nordmanniana, Cedrus libani, Picea orientalis, Pinus brutia, Pinus nigra, Pinus pinea, Pinus sylvestris.

Main host(s)

Balsam fir, black spruce, Douglas-fir, red spruce, tamarack, white spruce

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