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Articles containing the keyword 'Pityogenes chalcographus'

Category : Article

article id 5003, category Article
Hannu Saarenmaa. (1978). The occurrence of bark beetles (Col., Scolytidae) in a dead spruce stand flooded by beavers (Castor canadensis Kuhl.) . Silva Fennica vol. 12 no. 3 article id 5003. https://doi.org/10.14214/sf.a14857
Original keywords: kuusi; hyönteistuhot; tulva-alueet; kaarnakuoriaiset; kanadanmajava
English keywords: bark beetles; Norway spruce; Picea abies; Castor canadensis; insect damages; Trypodendron lineatum; flooded areas; Pityogenes chalcographus; Hylurgops palliatus; Ips typographus; Dryocetes autographus
Abstract | View details | Full text in PDF | Author Info

 

The aim of the study was to determine which kinds of insects had infected the Norway spruce (Picea abies (L.) H. Karst.) in different stands killed by flooding caused by beavers (Castor canadensis Kuhl), and if there was any danger that they would subsequently cause damage in the surrounding forests. The effect of tree diameter and certain stand characteristics on the fauna of dead trees are discussed. The occurrence of different insect combinations and qualifications for their coexistence were studied.

Pityogenes chalcographus L., Trypodendron lineatum O., Hylurgops palliatus Gyll. and Dryocetes autographus Ratz. occurred most abundantly. 20 phloem or wood boring species were observed in 5 regular succession types. Secondary species occurred in a virgin stand while Ips typographus L. was found at the edge of a felling area. Owing to the flooding, species preferring moist conditions were abundant. In this case damages had not spread to the surrounding forests which, however, might be possible under certain conditions.

The PDF includes a summary in English.

  • Saarenmaa, E-mail: hs@mm.unknown (email)

Category : Article

article id 7088, category Article
Uunio Saalas. (1919). Kaarnakuoriaisista ja niiden aiheuttamista vahingoista Suomen metsissä. Acta Forestalia Fennica vol. 10 no. 1 article id 7088. https://doi.org/10.14214/aff.7088
English title: Bark beetles and insect damages in Finnish forest.
Original keywords: kaarnakuoriaiset; hyönteistuho; entomologia
English keywords: forest pests; Tomicus piniperda; insect damage; Pityogenes chalcographus; Ips typographus; entomology; Scolytus Ratzburgi
Abstract | View details | Full text in PDF | Author Info

The aim of the study was to investigate the abundance of bark beetle species and their damage in Finland. The bark beetle populations were studied in several areas in Finland, both in sites with known beetle damage and without. Two-meter wide lines were measured in the sample plots, where all trees were studied for bark beetle damage in the stem and the crown of the trees. The abundance of bark beetle species and the beetle damages in 25 study areas, and 52 different species are discussed in detail.

Divided by their lifestyle, the most important groups of bark beetles are the pine shoot beetles (Tomicus sp.), beetles reproducing in Scots pine (Pinus sylvestris L.) stems and branches under the bark, beetles reproducing in Norway spruce (Picea abies (L.) H. Karst.) stems and branches under the bark, beetles living in the other coniferous trees, beetles reproducing in roots, beetles reproducing under the Betula sp. bark, beetles reproducing in other deciduous trees and beetles reproducing inside of the stems. Of individual species, Blastophagus piniperda (now Tomicus piniperda) and B. minor cause worst damage to pine and Ips typographus (L.) and Pityogenes chalcographus (L.) to spruce. Serious damage is caused also by Xyloterus lineatus to coniferous trees, Polygraphus polygraphus and P. subopacus to Norway spruce and Scolytus Ratzburgi to Betula sp.

The PDF includes a summary in German.
  • Saalas, E-mail: us@mm.unknown (email)

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