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  • 1
    Electronic Resource
    Electronic Resource
    Computer simulation of genetic control. Comparison of sterile males and field-female killing systems (1988)
    Springer
    Theoretical and applied genetics 76 (1988), S. 870-879 
    Details
    ISSN: 1432-2242
    Keywords: Genetic control ; Simulation ; Translocation ; Sterile male ; Lucilia cuprina
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A computer program, GENCON, designed to simulate genetic control using field-female killing systems, is described. These systems incorporate sex-linked translocations and conditional lethal mutations. Genetic death in field populations is caused by semisterility of the translocation and by homozygosis of the mutations in females and non-translocation males of field origin. Simulations using the program compare the effectiveness, in populations regulated by density, of genetic control using this type of system with control using sterile-male release. At high release rates, sterile males cause more rapid suppression and earlier eradication than sex-linked translocation strains. However, if releases are interrupted before eradication, the rate of recovery of density-dependent populations is more rapid following sterile-male release than following suppression with translocation strains. In such populations, the cumulative population suppression (number of individuals killed) is greater with translocation-strain release than with sterile-male release. At low release rates, sex-linked translocation strains can be much more effective at suppressing and eradicating density-dependent populations than sterile males. In continental Australia, eradication of the sheep blowfly Lucilia cuprina is probably not practicable. A suppression campaign using sex-linked translocation strains could yield a higher benefit to cost ratio than one using sterile males.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00273675
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Some observations onStrongwellsea castrans [Zygomycetes: Entomophthorales], a parasite of root flies [Delia spp.], in the south of Scotland (1986)
    Springer
    BioControl 31 (1986), S. 91-97 
    Details
    ISSN: 1573-8248
    Keywords: Insects ; traps ; allyl isothiocyanate ; Strongwellsea castrans ; Delia ; Brassica
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Les mouches des racines,Delia radicum (L.) etD. floralis (Fallén) [Diptera: Anthomyiidae] attrapées dans la culture du rutabaga dans le sud de l'Écosse, étaient contaminées parStrongwellsea castrans Batko & Weiser [Zygomycetes: entomophthorales]. Le pathogène était surtout associé aux fe nelles de la lère et de la 2ème générations deD. radicum et de la seule génération deD. floralis. Les cas de maladie montraient avec retard leur dépendance avec la densité des mouches. Les niveaux d'infection les plus grands étaient enregistrés pendant la saison la plus froide et la plus humide. Les bordures en friche des parcelles hébergeaient de plus grandes proportions deD. radicum infectés que les cultures. Des pièges jaunes sans appât ont attrapé de plus grandes proportions de mouches que lorsqu'ils étaient appâtés avec de l'huile de moutarde (allyl-isothiocyanate). Les raisons qui expliquent pourquoi les niveaux d'infection en Écosse sont plus élevés qu'ailleurs sont discutées.
    Notes: Abstract Root flies,Delia radicum (L.) andD. floralis (Fallén) (Diptera: Anthomyiidae), trapped in swede crops in the south of Scotland, were infected withStrongwellsea castrans Batko and Weiser (Zygomycetes: Entomophthorales). The pathogen was associated mainly with females of the 1st and 2nd generations ofD. radicum and of the single generation ofD. floralis. Disease incidence showed time-lagged density dependence. Greatest sustained infection levels were recorded in the coolest wettest season. Higher proportions ofD. radicum were infected in the headland than in the crop. Unbaited yellow water traps caught greater proportions of infected flies than traps baited with mustard oil (allyl isothiocyanate). The reasons for high levels of infection in Scotland are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02390923
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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