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  • 1
    Electronic Resource
    Electronic Resource
    Disrupting spring colonization of Colorado potato beetle to nonrotated potato fields (1994)
    Springer
    Entomologia experimentalis et applicata 73 (1994), S. 39-50 
    Details
    ISSN: 1570-7458
    Keywords: Leptinotarsa decemlineata ; Coleoptera ; Chrysomelidae ; distribution ; overwintering ; diapause ; cultural control ; trap cropping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Overwintering Colorado potato beetles (Leptinotarsa decemlineata (Say)) were concentrated primarily within woody borders, and mortality was lower in borders than in potato fields. After overwintering, only 15–44% of live beetles were in the potato fields. In experiments with small plots, colonization of fields from woody borders was reduced ∼60% by a trap crop, either treated with adulticide or with beetles collected daily. Such trap crops, or simply pitfall traps to prevent colonization from woody borders, could significantly reduce early-season adult numbers and subsequent larval populations. However, success is dependent on the local densities of overwintered beetles, and the prevalence of arrestment behavior in the case of trap crops.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02382512
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Distribution of overwintering Colorado potato beetle in and near Massachusetts potato fields (1993)
    Springer
    Entomologia experimentalis et applicata 66 (1993), S. 191-196 
    Details
    ISSN: 1570-7458
    Keywords: Leptinotarsa decemlineata (Say) ; Coleoptera ; Chrysomelidae ; distribution ; diapause ; overwintering ; mortality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02382289
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The determination of organotin compounds in fruit juices using gas chromatography-atomic absorption spectrometry (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 6 (1992), S. 579-585 
    Details
    ISSN: 0268-2605
    Keywords: Butyltin ; cyclohexyltin ; octyltin ; phenyltin ; fruit juice ; analysis ; GC MS ; GC AA ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A method for extracting butyl-, cyclohexyl-, octyland phenyl-tin compounds in fruit juices was developed using 0.05% tropolone in 25% pentane/diethyl ether. Methyl derivatives formed by Grignard reaction were quantified by gas chromatography-atomic absorption spectrometry. Several fruit juices contained low ng cm-3 levels of butyl- and octyl-tins. Gas chromatography-mass spectrometry, used for the confirmation of the butyl- and octyl-tins, also detected phenyl- and cyclohexyl-tin compounds at levels below the GC AA detection limits (0.03-0.05 ng Sn cm-3).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590060704
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    Paper (German National Licenses)
    Fulltext
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