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  • Choristoneura fumiferana  (5)
  • Astronomy  (1)
  • 2005-2009  (1)
  • 1985-1989  (5)
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  • 1
    Digitale Medien
    Digitale Medien
    Influence of epicuticular waxes from white spruce and balsam fir on feeding behavior of the eastern spruce budworm (1988)
    Springer
    Journal of insect behavior 1 (1988), S. 197-208 
    Details
    ISSN: 1572-8889
    Schlagwort(e): eastern spruce budworm ; Choristoneura fumiferana ; white spruce ; balsam fir ; epicuticular wax
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Fourth-instar larvae of the eastern spruce bud-worm Choristoneura fumiferanaClem. (Lepidoptera: Tortricidae) were shown in two-choice feeding tests to respond differently to epicuticular waxes from different white spruce and balsam fir trees. Larvae also showed different preferences for various wax fractions obtained by separation on silicic acid.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01052238
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Feeding preferences of eastern spruce budworm larvae in two-choice tests with combinations of host-plant extracts (1985)
    Springer
    Entomologia experimentalis et applicata 38 (1985), S. 221-225 
    Details
    ISSN: 1570-7458
    Schlagwort(e): Eastern spruce budworm ; Choristoneura fumiferana ; Tortricidae ; feeding behaviour ; host plant extracts ; sugars/glycosides ; amino acids/bases ; organic acids ; two-choice feeding tests ; fir ; Abies ; spruce ; Picea spp
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Beschreibung / Inhaltsverzeichnis: Résumé Trois extraits ont été obtenus de chacune de quatre plantes-hôtes: sucres/glycosides; acides aminées/bases organiques; acides organiques. Les quatre plantes-hôtes étudiées furent le sapin baumier, et les épinettes blanc, noir, et rouge. Le comportement gustatoire des larves a été étudié en raison de l'effet de combinaisons d'extraits de chaque plantehôte. Les résultats comparent la préférence des larves ainsi que leur consommation totale envers ces extraits.
    Notizen: Abstract Three extracts were obtained from each of four host plants: sugars/glycosides; amino acids/bases; and organic acids. The four hosts studied were balsam fir, black spruce, red spruce, and white spuce. The effects of recombined host plant extracts on the feeding behaviour of eastern spruce budworm larvae were examined in two-choice tests. Results compare feeding preferences as well as feeding rates between combinations of extracts. The importance of each class of polar compounds is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00295254
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Orientation behavior of second-instar larvae of eastern spruce budwormChoristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae) in a y-type olfactometer (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 837-845 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Eastern spruce budworm ; Choristoneura fumiferana ; Lepidoptera ; Tortricidae ; conifers ; Picea sp. ; Abies sp. ; host volatiles ; attraction ; larval olfaction ; olfactometer
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract A two-choice, wind-tunnel olfactometer was designed and contructed to determine whether second-instar eastern spruce budworm larvae,Christoneura fumiferana (Clem.), could detect and discriminate among host-plant volatiles. Volatiles of current year's growth ofPicea glauca were preferred over those ofP. rubens, P. mariana, or air.Abies balsamea was preferred overP. mariana or air.P. rubens andP. mariana were both preferred over air. Two-year-old growth ofP. glauca, A. balsamea, P. rubens, andP. mariana were all preferred over air. Current year's growth of these host evergreen species was usually preferred over former year's growth of the same species in each case.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01012072
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 4
    Digitale Medien
    Digitale Medien
    Tests for induction of feeding preferences in larvae of eastern spruce budworm using extracts from three host plants (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 809-817 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Eastern spruce budworm ; Lepidoptera ; Tortricidae ; Choristoneura fumiferana ; host preference ; deterrence
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Feeding preferences to extracts from three host plants were determined for sixth-instar eastern spruce budworm larvae reared on one of three hosts or on artificial diet. Preferences of foliage-reared larvae were compared to those of diet-reared, or naive, larvae. No effect of plant induction was found using amino acids and bases and chloroform extracts on test disks in three-choice experiments. Possible effects of habituation for sugars and glycosides from white spruce were shown. Organic acids contributed to a phenomenon of avoidance learning in larvae reared on all three hosts, showing that this fraction from balsam fir was the least deterrent, while that from black spruce was the most deterrent.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00988308
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Feeding preferences of eastern spruce budworm larvae in two-choice tests with extracts of mature foliage and with pure amino acids (1988)
    Springer
    Journal of chemical ecology 14 (1988), S. 1649-1656 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Eastern spruce budworm ; Choristoneura fumiferana ; Lepidoptera ; Tortricidae ; amino acids ; proline ; sucrose ; extracts ; host plants ; feeding behavior
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract The feeding preferences and feeding rates of eastern spruce budworm on extracts from mature foliage normally avoided by larvae indicate that the chemical composition of four major host plants does not account for this avoidance. Other factors such as the degree of lignification and/or moisture content of the older foliage may play a more important role. Of 14 amino acids tested, alanine, lysine, proline, and serine stimulated feeding. The interactions of amino acids and sucrose were studied, and the results are discussed in relation to feeding preferences and feeding rates.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01014549
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 6
    facet.materialart.
    Unbekannt
    V3885 Sagittarius: A Comparison With a Range of Standard Model Accretion Disks (2009)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-26
    Beschreibung: A chi-squared analysis of standard model accretion disk synthetic spectrum fits to combined Far Ultraviolet Spectroscopic Explorer and Space Telescope Imaging Spectrograph spectra of V3885 Sagittarius, on an absolute flux basis, selects a model that accurately represents the observed spectral energy distribution. Calculation of the synthetic spectrum requires the following system parameters. The cataclysmic variable secondary star period-mass relation calibrated by Knigge in 2006 and 2007 sets the secondary component mass. A mean white dwarf (WD) mass from the same study, which is consistent with an observationally determined mass ratio, sets the adopted WD mass of 0.7M(solar mass), and the WD radius follows from standard theoretical models. The adopted inclination, i = 65 deg, is a literature consensus, and is subsequently supported by chi-squared analysis. The mass transfer rate is the remaining parameter to set the accretion disk T(sub eff) profile, and the Hipparcos parallax constrains that parameter to mas transfer = (5.0 +/- 2.0) x 10(exp -9) M(solar mass)/yr by a comparison with observed spectra. The fit to the observed spectra adopts the contribution of a 57,000 +/- 5000 K WD. The model thus provides realistic constraints on mass transfer and T(sub eff) for a large mass transfer system above the period gap.
    Schlagwort(e): Astronomy
    Materialart: AD-A513043 , The Astrophysical Journal; 703; 1839-1850
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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