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  • 1
    Electronic Resource
    Electronic Resource
    Effect of ethanol and α-pinene on response of ambrosia beetle,Trypodendron lineatum, to lineatin-baited funnel and drainpipe traps (1996)
    Springer
    Journal of chemical ecology 22 (1996), S. 2187-2196 
    Details
    ISSN: 1573-1561
    Keywords: Trypodendron lineatum ; Scolytidae ; ambrosia beetle ; lineatin ; ethanol ; α-pinene ; pheromone ; semiochemical ; Coleoptera ; trapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The response ofT. lineatum to ethanol and α-pinene, when used with the pheromone lineatin, was tested for two trap types. Funnel traps, which are passive barrier traps, caught significantly more beetles than drainpipe traps, which require an active response by the beetle to enter the trap. However, the response ofT. lineatum to the semiochemical treatments did not significantly differ for the two trap types. Treatments that included α-pinene with the pheromone, either with or without ethanol, caught significantly moreT. lineatin than those with the pheromone alone. When ethanol and or α-pinene were added to the pheromone significantly more female beetles were trapped than with pheromone alone. Male-female ratios were significantly lower for both types of traps when ethanol was included in the bait than for lineatin alone or with α-pinene. A higher percentage of male beetles entered the drainpipe traps than was captured with funnel traps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02029539
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Dendroctonus pseudotsugae hopkins (Coleoptera: Scolytidae): Production of and response to enantiomers of 1-methylcyclohex-2-en-1-ol (1992)
    Springer
    Journal of chemical ecology 18 (1992), S. 1201-1208 
    Details
    ISSN: 1573-1561
    Keywords: Dendroctonus pseudotsugae ; Douglas-fir beetle ; Coleoptera ; Scolytidae ; aggregation pheromone ; production ; response ; methylcyclohexenol ; seudenol ; enantiomers ; trapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Female Douglas-fir beetles,Dendroctonus pseudotsugae, produced an average 45∶55 mixture of the (S)-(−)- and (R)-(+)-enantiomers of 1-methylcyclohex-2-en-1-ol (MCOL). The (S)-(−)∶(R)-(+) ratio of 3-methylcyclohex-2-en-1-ol (seudenol) produced by this population of females was 34∶66. Lindgren funnel traps baited with (R)-(+)-MCOL attracted significantly more males and females than (S)-(−)-MCOL-baited traps, which captured significantly more beetles than unbaited controls. The combined effect of the enantiomers was additive, rather than synergistic. Either enantiomer of MCOL increased catches by frontalin-baited traps. Racemic MCOL can be used for trapping Douglas-fir beetles in south-central British Columbia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00980074
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The response of mountain pine beetle (Dendroctonus ponderosae) to lodgepole pine trees baited with verbenone and exo-brevicomin (1992)
    Springer
    Journal of chemical ecology 18 (1992), S. 533-541 
    Details
    ISSN: 1573-1561
    Keywords: Dendroctonus ponderosae ; mountain pine beetle ; Coleoptera ; Scolytidae ; pheromone ; antiaggregation ; verbenone ; exo-brevicomin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract exo-brevicomin, a multifunctional pheromone of the mountain pine beetle,Dendroctonus ponderosae, was tested at release rates of 0.5 and 2.5 mg/day alone and in combination with the antiaggregation pheromone verbenone against unbaited controls. Significantly more lodgepole pinePinus contorta var.latifolia trees were attacked, and at higher densities, with both release rates ofexo-brevicomin than with all other treatments. Verbenone significantly reduced the response of mountain pine beetles toexo-brevicomin. Verbenone alone did not reduce the number of trees attacked by mountain pine beetle or the attack density when compared to the unbaited controls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987817
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Enantiomer Preference of Trypodendron lineatum and Effect of Pheromone Dose and Trap Length on Response to Lineatin-baited Traps in Interior British Columbia (2000)
    Springer
    Journal of chemical ecology 26 (2000), S. 667-677 
    Details
    ISSN: 1573-1561
    Keywords: Sex ratio ; multiple-funnel traps ; preparative chiral liquid chromatography ; microcrystalline cellulose triacetate ; Coleoptera: Scolytidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Both enantiomers of the aggregation pheromone lineatin were obtained in very high enantiomeric purity by preparative chiral liquid chromatography on microcrystalline cellulose triacetate. Catches of the striped ambrosia beetle, Trypodendron lineatum, in multiple-funnel traps baited with lineatin enatiomer ratios (plus/minus) of 100 : 0, 75 : 25, 50 : 50, 25 : 75, and 0 : 100, demonstrated that (+)-lineatin is the only active enantiomer in interior British Columbia, where two other Trypodendron species are sympatric. In additional experiments using (±)-lineatin, catches of both sexes increased significantly with trap length, either at a constant pheromone dose per trap, or a constant dose per four-funnel unit, up to 16 funnels per trap. When trap length was held constant at eight funnels, increasing the lineatin dose fourfold had no effect on trap catches.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005476105114
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    Paper (German National Licenses)
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