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The role of beetle and host volatiles in host colonization in the European oak bark beetle, Scolytus intricatus (Ratzeburg) (Col., Scolytidae)
Author(s) -
Hovorka O.,
Kindl J.,
Kalinová B.,
Knížek M.,
Vrkočová P.,
Koutek B.
Publication year - 2005
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.2005.00955.x
Subject(s) - biology , olfactometer , host (biology) , kairomone , bark beetle , frass , colonization , ecology , botany , bark (sound) , larva
Abstract: To understand the role of chemical signals involved in Scolytus intricatus (Ratzeburg) (Col., Scolytidae) host colonization, the attractiveness of intact and beetle colonized host material was investigated in the field and in the laboratory. In the field, chemical signals operating at long range were investigated by means of sticky traps. In the laboratory, close‐range chemical interactions were investigated with an arena olfactometer. Field experiments showed no differences in the attractiveness between infested and non‐infested host material. On the contrary, laboratory experiments revealed higher attractiveness of infested host and beetle‐produced frass in comparison with intact host and mechanically produced sawdust respectively. Laboratory data also disclosed the attractiveness of beetle extracts of both sexes. Our data show that: (1) host kairomones play an important role during host colonization, and that (2) S. intricatus does not use a sex‐specific secondary attractant system. Differences between results of field and laboratory trials are discussed.