Journal of Chemical Ecology

, Volume 21, Issue 7, pp 1043–1063

Semiochemicals from bark beetles: New results, remarks, and reflections

  • Wittko Francke
  • Jochen Bartels
  • Holger Meyer
  • Frank Schröder
  • Ulrich Kohnle
  • Ernst Baader
  • Jean Pierre Vité
Article

DOI: 10.1007/BF02033807

Cite this article as:
Francke, W., Bartels, J., Meyer, H. et al. J Chem Ecol (1995) 21: 1043. doi:10.1007/BF02033807

Abstract

A brief survey is given about recent results in the identification of semiochemicals in bark beetles: Males ofIps sexdentatus (Boern.), stressed by the attack on resinous trees produce large amounts of 3(S)-1-methyl-5-(1-hydroxyl-1-methylethyl)-cyclohexa-1,3-diene. The compound appears to be derived from Δ3-carene and acts as a repellent. Males ofIps typographus (L.), stressed through the attack on unsuitable host material release 3-methyl-7-methylene-1,3(E), 8-nonatriene, which seems to act as a repellent. The odor bouquet of three species ofPityogenes is described. The occurrence of (+)-grandisol and other compounds related to weevil pheromones points to a close relation between Scolytidae and Curculionidae. Females ofDendroctonus simplex (Le Conte) use (−)-frontalin as the main pheromone. 6-Methyl-6-hepten-2-one, a minor component among the volatile compounds released by the females, is regarded as a possible precursor of frontalin. Similarly, (2R,5S)-2(1-hydroxyl-1-methylethyl)-5-methyltetrahydrofuran, pityol, a pheromone ofPityophthorus spp., is regarded to at least share a common biogenetic precursor with 6-methyl-5-hepten-2-ol, sulcatol. A new bicylic acetal, 2-ethyl-1,5-dimethyl-6,8-dioxabicyclo[3.2.1]octane, is described as an aggregation pheromone of the beech bark beetle,Taphrorychus bicolor (Herbst). Structural relationships between bark beetle pheromones and plant volatiles are discussed.

Key Words

Bark beetle identification pheromone Dendroctonus Ips Pityogenes Pityophthorus Taphrorychus 

Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • Wittko Francke
    • 1
  • Jochen Bartels
    • 1
  • Holger Meyer
    • 1
  • Frank Schröder
    • 1
  • Ulrich Kohnle
    • 2
  • Ernst Baader
    • 2
  • Jean Pierre Vité
    • 2
  1. 1.Institut fur Organische Chemie der Universität HamburgHamburgGermany
  2. 2.Forstzoologisches Institut der Universität FreiburgStegen-WittentalGermany