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  • 1
    Electronic Resource
    Electronic Resource
    A new component of the female sex pheromone ofBlattella germanica (L.) (Dictyoptera: Blattellidae) and interaction with other pheromone components (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 1997-2008 
    Details
    ISSN: 1573-1561
    Keywords: German cockroach ; Blattella germanica ; Dictyoptera ; Blattellidae ; sex pheromone ; behavioral response ; contact pheromone ; 3,11-dimethyl-2-heptacosanone ; 3,11-dimethyl-2-nonacosanone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A fourth component, 3,11-dimethyi-2-heptacosanone, was identified as a cuticular contact sex pheromone of the female German cockroach,Blattella germanica. In behavioral assays, higher dosages of 3,11-dimethyl-2-heptacosanone were needed to elicit similar sexual responses in males to those elicited by the major pheromone component, 3,11-dimethyl-2-nonacosanone. A 15∶85 blend of the C27 and C29 methyl ketone homologs resulted in a dose-response curve intermediate between that of each of the components alone, indicating independence of activity of each component and lack of synergism. Moreover, the activity of 3,11-dimethyl-2-nonacosanone was not enhanced by female cuticular hydrocarbons. The relationship between sexual responses of males to females and to isolated female antennae, and the amount of cuticular pheromone on whole females was investigated. Cuticular sex pheromone found on females increased with the age of the female, as did the male response to whole females. However, a bimodal male response was elicited by isolated female antennae. Differences between behavioral and analytical assays of pheromone are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020511
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Structural correlation between cuticular hydrocarbons and female contact sex pheromone of German cockroachBlattella germanica (L.) (1989)
    Springer
    Journal of chemical ecology 15 (1989), S. 939-949 
    Details
    ISSN: 1573-1561
    Keywords: Contact sex pheromone ; cuticular hydrocarbons ; 3,11-dimethyl-2-nonacosanone ; 3,11-dimethyl-2-heptacosanone ; German cockroach ; Blattella germanica ; Orthoptera ; Blattellidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The structural relationships between the cuticular hydrocarbons and the contact sex pheromone of the female German cockroach,Blattella germanica, were investigated. Cuticular hexane extracts were separated into hydrocarbon and ketone fractions by TLC or silicic acid column chromatography. The ketone fraction (which contains the major contact sex pheromone component) was analyzed by GC-MS before and after reduction to ydrocarbon. In addition to 3,11-dimethyl-2-nonacosanone, 3,11-dimethyl-2-heptacosanone was also identified. Females have the 3,11- and 3,9-dimethyl C27 and C29 alkanes, but only the 3,11- isomer of the dimethylketones. Inddition to the hydrocarbon components previously reported, a number of new components were characterized. Although the ratios of cuticular hydrocarbons differ among nymphs, adult males, and adult females, they have qualitatively identical hydrocarbon profiles, suggesting that the production of the contact sex pheromone results from the sex-specific oxidation of 3,11-imethylalkanes to pheromone components by the female.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01015189
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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