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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
    Wind tunnel assays of olfactory responses of femaleRhagoletis pomonella flies to apple volatiles: effect of wind speed and odour release rate (1993)
    Springer
    Entomologia experimentalis et applicata 68 (1993), S. 99-108 
    Details
    ISSN: 1570-7458
    Keywords: Rhagoletis pomonella ; Tephritidae ; wind tunnel ; wind speed ; behaviour ; olfaction ; fruit volatiles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of wind speed and odour release rate on femaleRhagoletis pomonella (Walsh) (Diptera: Tephritidae) responses to synthetic host apple volatiles was studied in a wind tunnel bioassay. Three apple tree models were placed in the wind tunnel (upwind, central and downwind sections) after which flies were released individually on the central tree and their movements observed for 15 min. The experiment was designed as a two-way factorial with no odour and odour release rates of ca. 18 and ca. 500μg h−1 and still air and wind speeds of 0.8 and 1.6 m s−1 as treatments. Both wind speed and odour had significant effects on flight frequency (landings min−1) and general fly activity. Fly movement decreased as wind speed increased from 0 m s−1 to 0.8 and 1.6 m s−1, but this decrease was attenuated when air carried apple volatiles. When air was odour-free, flies exposed to 1.6 m s−1 wind moved downwind.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02380528
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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