ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of pest science 48 (1975), S. 97-104 
    ISSN: 1612-4766
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Insecticide treatment of unbarked conifer logs. Experiments with various substances in Sweden 1969–73 In 1969–73 the protection of unbarked pine and spruce logs by means of insecticides was studied at several localities in Sweden. Investigations have been carried out into the effect of eleven substances and various combinations, as well as formulations and concentrations, upon the attacks of bark beetles and other insects. More than 2 100 logs were used in the experiments. Lindane was by far the most effective. It had also a very good effect upon the beetles which entered or had entered the wood. All the carbamates studied, i. e. BPM-carbamate, carbaryl, mobam, promecarb, and propoxur, as well as the organophosphorous compounds Bayer 77488, fenitrothion, and fenthion, had an unsatisfactory effect. Endosulfane was not ineffective, but the tests were discontinued. Dursbane was studied on spruce only and had a good effect. One year after the treatment, lindane did no longer give reliable protection. After treatment in the autumn it protected against bark beetles on spruce in the spring, but had less effect on pine. There was no considerable difference in the effect of wettable powder and emulsion concentrate. In some cases wettable powder had a slightly better effect. The lowest suitable concentration was about 0,25%.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1570-7458
    Keywords: Hylobius abietis ; pine weevils ; Curculionidae ; olfactory orientation ; primary attraction ; bioassay ; terpenes ; Pinus sylvestris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Rüsselkäfer (Hylobius abietis) können auf der Erdoberfläche die Lage im Boden verborgenen Brutmaterials feststellen und Wurzeln senkrecht grabend auffinden. Mit einer neu entwickelten Methode für Laborversuche, die sich auf die spezifische Reaktion des Eingrabens zum Brutmaterial gründet, wurden das Orientierungsverhalten der Käfer und die zum Brutmaterial führenden Geruchsstoffe des Wirtes studiert. Beide Geschlechter von H. abietis reagierten gleichartig mit Eingraben auf die Geruchsstoffe des Wirtes. In Wahlversuchen zwischen gleichwertigen Anlockungspunkten kam häufig Aggregation der Käfer an einem Punkt vor. Die stärkere Ansammlung an einzelnen Stellen stand im Zusammenhang mit dem Vorhandensein einer Erdröhre zur Quelle der Geruchsstoffe. In den folgenden Versuchen wurde deshalb den Tieren jeweils nur eine Geruchsstoffquelle angeboten. Weder Weibchen noch Männchen im Boden übten eine Anziehung auf Käfer an der Oberfläche aus. Kiefernstücke und Kondensate flüchtiger Kieferinhaltsstoffe sowie Kondensat nach Passage durch die Kolonne des Gaschromatographen waren stark attraktiv. Alle durch präparative Gaschromatographie hergestellten Fraktionen des Kondensats waren ebenfalls, aber schwächer attraktiv. Zehnfache Verdünnung des Kondensats und der Fraktionen verminderte ihre Attraktivität mit etwa 40–70%. Auch Äthanol, Methanol und Pentan wurden geprüft; nur Äthanol hatte eine mässig anlockende Wirkung.
    Notes: Abstract Adults of Hylobius abietis (L.) (Coleoptera: Curculionidae) were found to locate conifer roots suitable for oviposition by utilizing host volatiles diffusing through the soil. Underground sources of host volatiles were presented to weevils in a laboratory bioassay. A cold-trapping condensate of Scots pine, Pinus sylvestris L., and fractions of it were tested. Various fractions containing host terpenes attracted weevils in the bioassay, but the complete pine condensate caused the highest response. Ethanol was also found to be attractive. Weevils caged underground in the absence of host material did not attract weevils on the surface.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 14 (1988), S. 1495-1503 
    ISSN: 1573-1561
    Keywords: Hylobius abietis ; Coleoptera ; Curculionidae ; sex attraction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Factors eliciting copulatory behavior in mature maleHylobius abietis were studied in the laboratory. Dead female weevils were sexually attractive, while dead mature males and pentane-extracted female weevils were not. The sexual attractiveness of dead females declined with time after death. Pentane extracts of whole female weevils or of the anterior or posterior parts of their bodies elicited a copulatory response when applied to decoys. In contrast, extracts of hindgut or frass were inactive. Juvenile males were sexually attractive for about four weeks, after which their attractiveness gradually declined. The results indicate that the mating stimulant is present on the body surface of female and juvenile male weevils, and it can be extracted with pentane.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1573-1561
    Keywords: Hylastes cunicularius ; Hylastes brunneus ; Hylastes opacus ; Dryocoetes autographus ; Hylobius abietis ; Hylobius pinastri ; α-pinene ; terpenes ; turpentine ; ethanol ; ground traps ; Coleoptera ; Scolytidae ; Curculionidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Responses of threeHylastes species,Dryocoetes autographus, and twoHylobius species to terpenes and ethanol were studied in field experiments on clear-cut forest sites in Sweden using baited ground traps.α-Pinene alone did not attract any of the six species. A terpene blend (spruce turpentine consisting mainly ofα-pinene,β-pinene, and 3-carene) attractedHylastes cunicularius, H. brunneus, andHylobius abietis in some experiments, but not in others. The attractiveness of ethanol also varied; the only species consistently attracted wasH. abietis. Baits containing both terpenes and ethanol, particularly the combination of spruce turpentine and ethanol, were attractive to all species exceptHylobius pinastri. InH. abietis, the terpene plus ethanol/ ethanol catch ratios increased during early summer. Seasonal differences in catch levels were observed inH. cunicularius andH. abietis. The addition ofα-pinene reduced the attractiveness of the combination of spruce turpentine and ethanol toH. cunicularius, H. opacus, andD. autographus. The differences in response to the volatiles between species are probably related to differences in reproductive behavior and host preferences.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of pest science 38 (1965), S. 39-41 
    ISSN: 1612-4766
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary In an experiment in the laboratory larvae of the larch sawflyPristiphora erichsoni Htg. in different instars reacted differently to DDT on a treated surface. The effects of the insecticide appeared later in older instars than in the younger ones. On an average, the larger and heavier the larvae within instars III, IV, and V were, the later a symptom appeared. This seems to indicate that the effect of DDT is directly related with the size or the weight of the larvae and only indirectly with age.
    Abstract: Résumé Les expériments concernant la digestibilité de laine des chenilles deHofmannophila pseudospretella donnaient les résultats suivants: 1. La capacité pour digérer laine se trouve en toute phase du développement. 2. Les chenilles plus ágées digèrent plus vivement. 3. En cas de mangeaille d'autres substances organiques avec, la laine est utilisée comme nourriture encore plus intensivement. 4. L'humidité du lieu n'est d'aucune influence sur la digestibilité. 5. Avant de se dépouiller les chenilles interrompent la susception de laine, et, pendant l'enlèvement de la peau, elles renouvellent l'épithélium de l'intestin moyen d'un seul coup. 6. Quant à la biologie il faut considérerHofmannophila pseudospretella comme insecte nuisible aux provisions et non comme insecte nuisible obligatoire à la laine.
    Notes: Zusammenfassung Die einzelnen Larvenstadien vonPristiphora erichsoni Htg. reagierten in einem Laboratoriumsversuch mit DDT-behandelter Unterlage unterschiedlich auf das Gift. Die Wirkung des DDT zeigte sich bei älteren Stadien später als bei jüngeren. Innerhalb der Stadien III, IV und V trat das Symptom umso später auf, je größer und schwerer die Larven im Durchschnitt waren. Demnach scheint die Wirkung des DDT von der Größe oder dem Gewicht der Tiere und nur indirekt von ihrem Alter abzuhängen.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of pest science 39 (1966), S. 8-10 
    ISSN: 1612-4766
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary Differences in attack by the aphidAdelges laricis Vallot were found between clones in a clonal plantation ofLarix sibirica andL. decidua in northern Sweden. In a plantation of larch in central SwedenL. decidua was heavily attacked by hibernating larvae ofA. laricis, whereas asiatic larch of various origins bore only a very low level of infestation. Two origins of European larch displayed differences both in degree as well as in distribution of aphid attack. Neither bark thickness nor structure could be shown to influence attack.
    Abstract: Résumé Les diffèrents degrès d'attaque parAdelges laricis sur plusieurs clônes deLarix sibirica etLarix decidua ont été déterminés dans un plantage de Suède du nord (5 mètres d'équidistance entre les plans). Dans un plantage semblable de mélèze en Suède centrale,Larix decidua était fortement attaqué par des chenilles hivernantes d'Adelges laricis alors que les mélèzes asiatiques de diffèrentes provenances n'étaient que peu touchés. Deux origines diffèrentes de mélèze d'Europe présentaient de notables variations quant à la force et la répartition de l'attaque. Une influence de lépaisseur de l'écorce ou de sa structure sur l'attaque des pucerons ne pouvait être mise à jour.
    Notes: Zusammenfassung In einer Plantage mit Klonen vonLarix sibirica undL. decidua in Nordschweden wurden Unterschiede zwischen den Klonen im Befall vonAdelges laricis festgestellt. In einer Lärchenplantage in Mittelschweden warL. decidua stark von überwinternden Hiemalis-Larven derA. laricis befallen, während asiatische Lärchen weitgehend verschont blieben. Europäische Lärchen von zwei Herkünften unterschieden sich deutlich in der Stärke und der Verteilung des Befalls. Ein Einfluß der Rindendicke oder -struktur auf den Läusebefall konnte nicht nachgewiesen werden.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of pest science 43 (1970), S. 22-26 
    ISSN: 1612-4766
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary In cages and a field experiment the degree of feeding by the pine weevilHylobius abietis L. and the plant mortality caused by the attack were studied in different types of conifer plants. The plants of the larger types were more often attacked than the smaller plants in both experiments. In the cages the mean degree of feeding was also higher for the larger plants. In the total mean Scots pine and Norway spruce were attacked with the same frequency and in the same degree. The plant mortality, however, was considerably larger in pine than in spruce. The sensitivity of different plant types to feeding damage was determined as an index from the percentage plant mortality and the mean degree of feeding per attacked plant. The index showed a generally higher sensitivity in smaller plant types than of larger ones. Pine was more sensitive than spruce. Breeding of plants in a plastic greenhouse during one vegetation period did not raise their disposition towardsHylobius-attack.
    Abstract: Résumé Le dégré de nutrition de l'Hylobius abietis L. et la mortalité due à l'attaque ont été étudiés en cages et dans une expérience en plein champ chez différentes espèces de conifères. Dans les deux expériences, les plus grandes plantes ont été attaquées plus souvent que les moins grandes. Dans les cages la quantité moyenne de nutrition a aussi été plus considérable pour les grandes plantes. La fréquence et la force des attaques ont été les měmes chez les pins et les épicéas. Par contre la mortalité a é té notablement plus élevée chez les pins. La sensibilité des différentes plantes aux dégâts de nutrition a été exprimée comme un index et determinée à partir du taux de mortalité des plantes et du degré moyen de nutrition par plante attaquée. L'index a montré en général une plus grande sensibilité chez les moins grandes plantes que chez les plus grandes. La sensibilité du pin a été plus grande que celle de l'épicéa. La culture des plantes en serre pendant une période de végétation n'augmente pas leur disposition aux attaques des hylobies du pin.
    Notes: Zusammenfassung Das Ausmaß des Fraßes vonHylobius abietis L. und die dadurch verursachte Sterblichkeit wurde in Zwingern und einem Feldversuch an verschiedenen Pflanzentypen studiert. In beiden Versuchen waren die größ eren Pflanzentypen häufiger befallen als die kleineren Pflanzen. Im Zwingerversuch war auch der durchschnittliche Fraß an den größeren Pflanzen stärker. Kiefern und Fichten waren im Gesamtdurchschnitt gleich häufig und gleich stark befallen. Dagegen war die Sterblichkeit unter den Kiefern wesentlich höher als unter den Fichten. Die Empfindlichkeit verschiedener Pflanzentypen für Fraßschäden wurde als Index aus der prozentualen Sterblichkeit und dem mittleren Ausmaß des Fraßes pro befallener Pflanze bestimmt. Danach waren die kleineren Pflanzen im allgemeinen wesentlich empfindlicher als großere Pflanzen und Kiefern empfindlicher als Fichten. Zucht der Pflanzen während einer Vegetationsperiode im Treibhaus erhöhte nicht ihre Anfälligkeit für Russelkäferschäden.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 1965-03-01
    Print ISSN: 1612-4758
    Electronic ISSN: 1612-4766
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 1966-01-01
    Print ISSN: 1612-4758
    Electronic ISSN: 1612-4766
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 1985-01-01
    Print ISSN: 0031-9422
    Electronic ISSN: 1873-3700
    Topics: Biology , Chemistry and Pharmacology
    Published by Elsevier
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...