标题：Verstärktes Auftreten des Kleinen Buchenborkenkäfers in Bayern – Aktuelle Erkenntnisse zur Schwärmaktivität und zum Befallsverhalten in Abhängigkeit von Lufttemperatur und Holzfeuchte
摘要：Climatic conditions of the last years had a favourable
effect on the distribution and development of the usually
not frequently occurring Beech bark beetle
(Taphrorychus bicolor Hrbst.) being fairly unimportant
to forestry so far. The increased population density of
this pest since the drought of 2003 provided the
opportunity to thoroughly investigate swarming activity
and attack behaviour with the aid of electronic
weather stations in connection with pheromone traps.
The results gave an insight into the seasonal and diurnal
flight behaviour of the Beech bark beetle. It was
influenced by microclimatic conditions, especially by
air temperature. The insect flight activity is limited by
a minimum air temperature of 14.0 °C.Wood moisture
measurements of infested and uninfested beech
stems showed that the Beech bark beetle is able to
colonize both green and intense dried wood successfully.
In the case of mass propagation this secondary
pest is able to gain influence on the dieback process
of predisposed beech stands due to drought stress.
