%0 Article
%T Flight periods of some birch timber insects.
%A Löyttyniemi, Kari
%D 1983
%J Silva Fennica
%V 17
%N 4
%R doi:10.14214/sf.a15185
%U https://silvafennica.fi/article/5202
%X <p>Flight periods of insects breeding on birch (<em>Betula</em> sp.) timber were observed by means of window flight traps baited with freshly cut birch logs in five locations in Finland from 1972 to 1976. Only few species were caught during the study. In general, these species were on the wing during midsummer, although flight periods of some of them were relatively long. <em>Scolytus ratzeburgi</em>&nbsp;Jans. caused harmful staining of wood within a month from attack, but the damage by the wood-boring pests remained negligible throughout the first storage summer.</p>
<p>The PDF includes a summary in Finnish.</p>