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  • aggregation pheromone  (5)
  • Springer  (5)
  • American Institute of Physics
  • 2005-2009
  • 1995-1999  (3)
  • 1990-1994  (2)
  • 1980-1984
Collection
Keywords
Publisher
  • Springer  (5)
  • American Institute of Physics
Years
  • 2005-2009
  • 1995-1999  (3)
  • 1990-1994  (2)
  • 1980-1984
Year
  • 1
    Electronic Resource
    Electronic Resource
    Ethyl propionate: Synergistic kairomone for african palm weevil,Rhynchophorus phoenicis L. (Coleoptera: Curculionidae) (1994)
    Springer
    Journal of chemical ecology 20 (1994), S. 889-897 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Rhynchophorus phoenicis ; Elaeis quineensis ; kairomone ; synergism ; oil palm ; palm weevil ; palm volatiles ; host selection ; primary attraction ; aggregation pheromone ; 3-methyl-octan-4-ol ; ethyl acetate ; ethyl propionate ; isobutyl propionate ; ethyl butyrate ; ethyl isobutyrate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Small trunk pieces of a freshly felled 10-year-old oil palm,Elaeis quineensis (Jacq.), were placed in a modified Nalgene desiccator, and volatiles captured for six days on Porapak Q. Gas chromatographic (GC) analysis of Porapak-Q-trapped volatiles with both flame ionization (FID) and electroantennographic detection (EAD) using male or femaleR. phoenicis antennae revealed several EAD-active compounds. They were identified as: ethyl acetate, ethyl propionate, isobutyl propionate, ethyl butyrate, and ethyl isobutyrate. In field experiments in the La Me Research Station, Côte d'Ivoire, ethyl propionate (50 mg/24 hr) but not all esters combined (50 mg/24 hr each) significantly increased capture ofR. phoenicis in pheromone-baited (3 mg/24 hr) traps. One kilogram of 1- to 3-day-old palm tissue was significantly more effective than ethyl propionate in enhancing pheromone attraction. Superior attraction of palm tissue may be attributed to additional as yet unknown semiochemicals. Alternatively, release rates and/or ratios of synthetic volatiles differed from those of palm tissue at peak attraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02059585
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  • 2
    Electronic Resource
    Electronic Resource
    Aggregation pheromone of coconut rhinoceros beetle,Oryctes rhinoceros (L.) (coleoptera: Scarabaeidae) (1995)
    Springer
    Journal of chemical ecology 21 (1995), S. 1549-1570 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Scarabaeidae ; Oryctes rhinoceros ; coconut rhinoceros beetle ; aggregation pheromone ; pheromone chirality ; ethyl 4-methyloctanoate ; ethyl 4-methylheptanoate ; 4-methyloctanoic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Male coconut rhinoceros beetles,Oryctes rhinoceros (L.), produce three sex-specific compounds, ethyl 4-methyloctanoate, ethyl 4-methylheptanoate, and 4-methyloctanoic acid, the first of which is an aggregation pheromone. Synthesis of these compounds involving conjugate addition of organocuprates to ethyl acrylate is reported. In field trapping experiments, (4S)-ethyl 4-methyloctanoate and the racemic mixture were equally attractive and 10 times more effective in attracting beetles than ethyl chrysanthemumate, a previously recommended attractant. Ethyl 4-methylheptanoate was as attractive as ethyl chrysanthemumate and more attractive than 4-methyloctanoic acid, but further studies are required before it can be classed as an aggregation pheromone. Compared to ethyl 4-methyloctanoate alone, combinations of the three male-produced compounds did not increase attraction, whereas addition of freshly rotting oil palm fruit bunches to pheromone-baited traps significantly enhanced attraction. With increasing dose, captures ofO. rhinoceros increased, but doses of 6, 9, and 18 mg/day were competitive with 30 mg/day lures. Newly designed vane traps were more effective in capturing beetles than were barrier or pitfall traps. Results of this study indicate that there is potential for using ethyl 4-methyloctanoate in operational programs to controlO. rhinoceros in oil palm plantations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02035152
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  • 3
    Electronic Resource
    Electronic Resource
    Structure, chirality, and field testing of a male-produced aggregation pheromone of Asian palm weevilRhynchophorus bilineatus (Montr.) (Coleoptera: Curculionidae) (1995)
    Springer
    Journal of chemical ecology 21 (1995), S. 1619-1629 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Curculionidae ; Rhynchophorus bilineatus ; aggregation pheromone ; pheromone chirality ; (4S,5S)-4-methyl-5-nonanol ; coconut palm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract 4-Methyl-5-nonanol is a male-produced aggregation pheromone of the Asian palm weevil,Rhynchophorus bilineatus (Montr.). The pheromone was identified by coupled gas chromatographic-electroantennographic detection (GC-EAD) and coupled GC-mass spectrometric (MS) analyses of male-and female-produced volatiles. Analyses by GC-EAD and GC-MS of weevil-produced and stereoselectively synthesized isomers of 4-methyl-5-nonanol on a Cyclodex B column, which separated isomers with baseline resolution, revealed that only (4S,5S)-4-methyl-5-nonanol is EAD active and produced by the males. In field experiments in Papua New Guinea, (4S,5S)-4-methyl-5-nonanol and a racemic mixture of disatereoisomers of it enhanced attraction of male and female weevils to sugarcane-baited traps. (4S,5S)-4-Methyl-5-nonanol is also an aggregation pheromone of two other Asian palm weevils.R. ferrugineus (Oliv.) andR. vulneratus (Panz.). The stereoisomeric mixture of 4-methyl-5-nonanol is currently used to manage populations ofR. bilineatus in Papua New Guinea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02035156
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  • 4
    Electronic Resource
    Electronic Resource
    Pheromone chirality of asian palm weevils,Rhynchophorus ferrugineus (Oliv.) andR. vulneratus (Panz.) (Coleoptera: Curculionidae) (1996)
    Springer
    Journal of chemical ecology 22 (1996), S. 357-368 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Curculionidae ; Rhynchophorus ; aggregation pheromone ; pheromone chirality ; 4-methyl-5-nonanol and 4-methyl-5-nonanone ; Asian palm weevils
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Production of 4-methyl-5-nonanol, and 4-methyl-5-nonanone by two sympatric Asian palm weevils,Rhynchophorus ferrugineus (Oliv.) andR. vulneratus (Panz.) suggested that enantiospecificity of either compound could impart species specificity of pheromone communication. Weevil-produced, racemic 4-methyl-5-nonanol and 4-methyl-5-nonanone and their stereoselectively synthesized optical isomers were subjected to gas chromatographic-electroantennographic detection (GC-EAD) and GC-mass spectrometry (MS) on a chiral Cyclodex-B column. Only theS,S stereoisomer of 4-methyl-5-nonanol was EAD active and was produced by bothR. ferrugineus andR. vulneratus. Production and EAD activity of (S)-4-methyl-5-nonanone exceeded that of its antipode in both weevils. In field experiments in Java. (4S, 5S)-4-methyl-5-nonanol and the stereoisomeric mixture were equally attractive. The 4R,5R stereoisomer was inactive. The corresponding ketone enantiomers neither enhanced nor reduced attraction to (4S,5S)-4-methyl-5-nonanol. Lack of apparent differences betweenR. ferrugineus andR. vulneratus pheromones suggests that synonomy of both weevils should be considered unless other pre- or postzygotic reproductive isolating mechanisms are disclosed in future studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02055104
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  • 5
    Electronic Resource
    Electronic Resource
    Pheromone chirality of african palm weevil,Rhynchophorus phoenicis (F.) and palmetto weevil,Rhynchophorus cruentatus (F.) (Coleoptera: Curculionidae) (1994)
    Springer
    Journal of chemical ecology 20 (1994), S. 2653-2671 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Curculionidae ; Rhynchophorus phoenicis ; Rhynchophorus cruentatus ; aggregation pheromone ; pheromone chirality ; (3S,4S)-3-methyl-octan-4-ol ; (3R,4R)-3-methyl-octan-4-ol ; (3S,4R)-3-methyl-octan-4-ol ; (3R,4S)-3-methyl-octan-4-ol ; (4S,5S)-5-methyl-octan-4-ol ; (4R,5R)-5-methyl-octan-4-ol ; (4S,5R)-5-methyl-octan-4-ol ; (4R,5S)-5-methyl-octan-4-ol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract There are four stereoisomers of both 3-methyl-octan-4-ol, the aggregation pheromone of the African palm weevil,Rhynchophorus phoenicis (F.) and 5-methyl-octan-4-ol, the aggregation pheromone of the palmetto weevil,Rhynchophorus cruentatus (F.). Synthetic stereoisomers of 3-methyl-octan-4-ol and 5-methyl-octan-4-ol were baseline-separated on a Cyclodex-B fused silica column. Use of this column in gas chromatographic-electroantennographic detection (GC-EAD) and GC-mass spectrometric (GC-MS) analyses revealed that only one stereoisomer, (3S,4S)-3-methyl-octan-4-ol and (4S,5S)-5-methyl-octan-4-ol, is produced by maleR. phoenicis and maleR. cruentatus, respectively, and elicits good antennal responses by conspecific male and female weevils. In field trapping experiments, withR. phoenicis in Côte d'Ivoire andR. cruentatus in Florida, (3S,4S)-3-methyl-octan-4-ol and (4S,5S)-5-methyl-octan-4-ol strongly enhanced attraction of fresh palm tissue, whereas other stereoisomers were behaviorally benign. Stereoisomeric 3-methyl-octan-4-ol and 5-methyl-octan-4-ol may be utilized to monitor and/or manage populations of these two palm weevils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02036199
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