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  • 1975-1979  (4)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 268 (1977), S. 139-140 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The striped pattern of the dorsal plate (pronotum, Fig. 1) provided ready identification of melanised cockroaches. When a melanised nymph moulted into an older nymph or adult, the abnormal coloration was lost together with the old cuticle. Since only the outer layers of the integument are shed at ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 20 (1976), S. 195-198 
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Bei Wahlversuchen entschieden sich Adulte und Nymphen vonBlattella germanica (L.) nicht gegen Nahrung, die mit R-20458 oder mit Ro 20-3600 behandelt war (200 ppm), womit das Fehlen einer Non-Präferenz erwiesen war. Ferner zeigten in einer gesonderten Studie mit behandelten Papierkarten (0,5 mg/cm2) diese zwei Insektenwachstumsregulatoren keine signifikante Abschreckung gegenüber Adulten der Deutschen Schabe. Dagegen erwies sich Farnesol signifikant als repellent. Köderformulierungen von synthetischen Insektenwachstumsregulatoren mit Juvenilhormonaktivität erscheinen aussichtsreich für die Bekämpfung der Deutschen Schabe.
    Notes: Abstract Blattella germanica (L.) (Dictyoptera: Blattellidae) adults and nymphs provided with choice food did not discriminate against food treated (200 ppm) with either R-20458 or Ro 20-3600 indicating the absence of non-preference. Also, in a separate study with treated paper cards (0.5 mg/cm2), these two insect growth regulators did not exhibit any significant repellency to the German cockroach adults. Farnesol, however, was found to be significantly repellent. The bait formulations of synthetic insect growth regulators with juvenile hormone activity appear promising for the control of German cockroach.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Laboratory populations of German cockroach reared on food treated with R-20458 (75 ppm) or Ro 20-3600 (3000 ppm) became completely sterile and eventually extinct. The hypertrophied oocytes had excessively laid chorion, and the hypertrophied accessory sex glands contained excessive amounts of protein.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 11 (1978), S. 202-205 
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A reproducible and chemically stable inorganic ion-exchanger, niobium arsenate has been prepared by mixing acidic solutions of niobium sulphate and sodium aresenate in the ratio 1∶4 under different conditions. Its exchange behaviour after heat treatment has been studied. The analytical utility of this material is illustrated by its ability to separate quantitatively Ni(II) from V(V) and Fe(III). Mn(II) from V(V) and Fe(III).
    Type of Medium: Electronic Resource
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