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Kari Löyttyniemi

Tikaskuoriaisesta (Trypodendron lineatum Oliv., Col., Scolytidae) kuorellisen havupuutavaran pilaajana.

Löyttyniemi K. (1967). Tikaskuoriaisesta (Trypodendron lineatum Oliv., Col., Scolytidae) kuorellisen havupuutavaran pilaajana. Silva Fennica vol. 1 no. 2 article id 4746. https://doi.org/10.14214/sf.a14456

English title: Damages caused to timber with bark by spruce ambrosia beetle (Trypodendron lineatum) in Finland.

Abstract

The paper studied the effect of felling time and conditions in the forest depot of timber to damages caused by spruce ambrosia beetle (Trypodendron lineatum Oliv.) to coniferous timber with bark, both experimentally and observing forest depots in Finland. Effects of fellings was studied by studying the abundance of the beetles in logging residue.

The results show that the spruce ambrosia beetles favour timber felled during the late autumn and winter, stored in a shaded place in the forest. In addition, new spruce stumps maintain and increase the beetle population. Fellings in the forest will increase population during the next year and cause damages in forest depot of timber nearby, because the insect breeds in the stumps. The experiments showed that it is possible to diminish the damages caused by the beetle to timber with bark by spraying with insecticides, and timing the fellings and transport of timber so that there is no timber in the forest in the spring during the time when the insect swarms.

The PDF includes a summary in German.

Original keywords
havutikaskuoriainen; hyönteiset; kaarnakuoriaiset; hyönteistuhot; puutavara; varastointi; puutavarapinot; hakkuut

English keywords
spruce ambrosia beetle; Trypodendron lineatum; insect damage; roundwood; forest depot; bark beetles; fellings

Published in 1967

Available at https://doi.org/10.14214/sf.a14456 | Download PDF

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