ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
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
    Molecular orbital calculations of the electronic spectra of aromatic hydrocarbon mononegative ions (1973)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 77 (1973), S. 1814-1816 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100633a019
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    BIOLOGY AND MANAGEMENT OF ECONOMICALLY IMPORTANT LEPIDOPTERAN CEREAL STEM BORERS IN AFRICA (2002)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Entomology 47 (2002), S. 701-731 
    Details
    ISSN: 0066-4170
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Notes: Abstract Cereals (maize, sorghum, millet, rice) are extremely important crops grown in Africa for human consumption. Of the various insect pests attacking cereal crops in Africa, lepidopteran stem borers are by far the most injurious. All 21 economically important stem borers of cultivated grasses in Africa are indigenous except Chilo partellus, which invaded the continent from India, and C. sacchariphagus, which has recently been found in sugarcane in Mozambique. C. partellus is competitively displacing indigenous stem borers in East and southern Africa. A parasitoid, Cotesia flavipes, was introduced from Pakistan for biological control of C. partellus and caused a 32-55% decrease in stem borer densities. This article is an attempt to summarize the status of knowledge about economically important cereal stem borers in Africa with emphasis on their distribution, pest status and yield losses, diapause, natural enemies, cultural control, host plant resistance, and biological control. Special attention is given to Busseola fusca and C. partellus, the most important pests of maize and grain sorghum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ento.47.091201.145254
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    COMMENTS ON “COMPATIBILITY OF EM AND IP SURVEYS” (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 25 (1977), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1977.tb01161.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Intercropping increases parasitism of pests (1997)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 388 (1997), S. 631-632 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As part of a programme for controlling lepidopteran stem-borers in cereal crops in Africa, we have investigated the effectiveness of combined cropping regimes of cultivatedand wild plants for reducing stem-borer damage. Intercropping with the non-host molasses grass, Melinis minutiflora, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/388631b0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Prediction of Early- and Late-Growth Morphologies of Ionic Crystals (1998)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 54 (1998), S. 384-390 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Comparison of early- and late-growth crystal morphologies of several water-soluble ionic materials suggests that early rapid growth is accompanied by a specific type of morphological distortion. This distortion, involving a change in the relative growth rate of just one growth direction, is consistent with our previously proposed mechanism for the transition from normal, polyhedral crystal growth to dendritic growth. Interpretation of this morphological distortion was aided by morphology prediction methods based on computed attachment energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108768198002614
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Nickel Bistrifluorostannate(II) Hexahydrate, [Ni(H2O)6](SnF3)2 (1995)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 51 (1995), S. 345-346 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270194011340
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Behavioral and physiological responses of rice leaffolder Cnaphalocrocis medinalis to selected wild rices (1989)
    Springer
    Entomologia experimentalis et applicata 52 (1989), S. 7-13 
    Details
    ISSN: 1570-7458
    Keywords: Insecta ; insect resistance ; leaffolders ; wild rices
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Der Reisblattroller, Cnaphalocrocis medinalis, ist ein Hauptschädling für Reis in mehreren asiatischen Ländern. Züchtung von Resistenz genenüber dem Blattroller ist eine praktikable Methode der Bekämpfung dieses Schädlings. Da alle modernen Reissorten gegen C. medinalis anfällig sind, werden verbesserte Sorten mit Resistenz gegenüber diesem Schädling benötigt. Glücklicherweise zeigen einige Wildreisarten ausgeprägte Resistenze gegenüber diesem Schädling. Die Resistenzmechanismen für C. medinalis in Wildreis sind jedoch unklar. Wir untersuchten auf welche Weise die Etablierung von C. medinalis auf selektierten Wildreisarten beeinflusst wird. Von vier ausgewählten Wildreisarten zeigten Oryza perennis und O. punctata Resistenz gegenüber dem Blattroller, während O. australiensis und O. nivara mässig resistant waren. Larven von C. medinalis zeigten ein starke Nicht-Präferenz in der Besiedlung von O. australiensis, O. perennis und O. nivara im Vergleich zu der anfälligen Reissorte IR36. Von den getesteten Wildreisarten wurde jedoch nur O. australiensis hinsichtlich Larvenbesiedlung und-frass stärker bevorzugt als die resistenten TKM6 Pflanzen. Der Wachstumsindex von C. medinalis war, mit Ausnahme von O. punctata, auf allen Wildreisarten signifikant niedriger als auf IR36 und TKM6 Pflanzen. Im Käfig zeigte das erste Larvenstadium an O. perennis signifikant niedrigere Larven- und Puppengewichte als an den übrigen Wildreisarten. Die Beigabe von trockenem Blattmehl von O. punctata und O. perennis Wildreis zur künstlichen Nahrung verursachte hohe Larvensterblichkeit. Eiablegende Weibchen zeigten weniger Präferenz für Wildreis als für IR36 und TKM6 Pflanzen. Da Resistenz gegen C. medinalis in angebauten Reissorten selten vorkommt, könnte die Resistenz, die in Wildreis identifiziert wurde, im Züchtungsprogramm Verwendung finden.
    Notes: Abstract Of four wild rices evaluated, Oryza perennis and O. punctata showed resistance to rice leaffolder, Cnaphalocrocis medinalis (Guenée), whereas O. australiensis and O. nivara were moderately resistant. C. medinalis larvae showed a strong nonpreference for settling and feeding on Oryza australiensis, O. perennis and O. nivara as compared to susceptible IR36 rice variety. Among wild rices tested, however, only O. australiensis, was more preferred for larval settling and feeding than resistant TKM6 plants. The growth index of C. medinalis on all wild rices, except O. punctata was significantly lower than on IR36 and TKM6 plants. First-instar larvae caged on O. perennis showed significantly lower larval and pupal weights than those on other wild rices. Incorporation of dry leaf powder of O. punctata and O. perennis wild rices in an artificial diet caused high larval mortality. Ovipositing gravid females showed less preference for wild rices than for IR36 and TKM6 plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00163936
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Feeding site selection of first-instar larvae of Cnaphalocrocis medinalis on susceptible and resistant rice plants (1991)
    Springer
    Entomologia experimentalis et applicata 60 (1991), S. 43-49 
    Details
    ISSN: 1570-7458
    Keywords: Rice leaffolder ; neonate larval ; feeding site ; movement ; whorl leaf ; mature leaf ; resistance ; varieties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract More first-instar larvae of the rice leaffolder, Cnaphalocrocis medinalis (Guenée), were recovered from susceptible IR36 and Roxoro rice varieties than resistant TKM6 and Oryza perennis, 24 h after infestation. Within a rice plant, a higher proportion of larvae was recovered from young whorl leaf, followed by mature leaves and leafsheaths on all the four rice varieties tested. However, differences were observed between susceptible and resistant varieties in the distribution of larvae on these three plant parts. In laboratory choice tests, first-instar larvae preferred to settle on the young leaves of IR36 and TKM6 when presented with their respective mature leaves. No such preference was observed in tests with Rexoro and O. perennis. Larval survival was similar on young and mature leaves of Rexoro. Young leaves of IR36 and TKM6 were more suitable for survival in comparison with their respective mature leaves while the reverse was true for O. perennis. Larval movement was slower on the mature leaves and larvae took longer to reach the whorl leaf of TKM6 than on IR36. The density of trichomes of the abaxial surface of TKM6 was higher than that of the other varieties tested. Adaptive significance of feeding in the leafwhorl to young larvae is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00164958
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Role of trichomes in soybean resistance to cabbage looper, Trichoplusia ni (1986)
    Springer
    Entomologia experimentalis et applicata 42 (1986), S. 109-117 
    Details
    ISSN: 1570-7458
    Keywords: cabbage looper ; Trichoplusia ni ; Glycine max ; soybeans ; trichomes ; plant resistance ; Noctuidae ; Lepidoptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé L'influence de la densité et de la longueur des trichomes de Glycine max sur la résistance à Trichoplusia ni a été évaluée suivant la position des feuilles sur une lignée résistante (‘PI 227687’) et sur un cultivar sensible (‘Davis’). Les feuilles apicales (juvéniles) tant de PI 227687 que de Davis, recouvertes de trichomes denses, résistèrent mieux à l'alimentation larvaire et à la survie de T. ni. Quand ces trichomes étaient éliminés, ces feuilles ne résistaient pas plus à l'alimentation des larves de T. ni que les feuilles non rasées TL3 et TL5 de PI 227687 ou toutes les autres feuilles de Davis. Les tests avec des extraits dans l'acétate d'éthyle et l'hexane de feuilles provenant de différentes positions de PI 227687 et Davis, destinés à mettre en évidence des phagodissuadants, ont montré que la résistance observée chez les feuilles apicales de Davis était attribuable aux trichomes (c'est-à-dire à un caractère morphologique), tandis que chez les mêmes feuilles de PI 227687 elle impliquait à la fois des trichomes (morphologie) et des substances chimiques, mais avec une prédominance de l'influence des trichomes.
    Notes: Abstract Role of leaf trichome density and length in Glycine max (L.) Merr. resistance to Trichoplusia ni (Hübner) was evaluated at different leaf positions on a relatively resistant soybean, plant introduction (PI) 227687, and a relatively susceptible cultivar, ‘Davis’. The uppermost (juvenile) leaf within both PI 227687 and ‘Davis’ plants, which is densely covered with trichomes, was most resistant to T. ni larval feeding and survival. When these trichomes were shaven off, such leaves became as susceptible to T. ni larval feeding as unshaven TL3 and TL5 leaves (PI 227687) or all other unshaven leaves (‘Davis’). Bioassays for antifeedants in ethyl acetate and hexane extractables from leaves at the different positions on PI 227687 and ‘Davis’ plants showed that the resistance observed in the uppermost ‘Davis’ leaf is attributable to trichomes (i.e., a morphological factor); whereas, in the uppermost PI 227687 leaf it involves both morphological (trichomes) and chemical factors, but the trichome parameter is dominant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00343536
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Aberrations caused by neem oil odour in green leafhopper feeding on rice plants (1986)
    Springer
    Entomologia experimentalis et applicata 42 (1986), S. 279-284 
    Details
    ISSN: 1570-7458
    Keywords: Feeding behaviour ; green leafhopper ; neem oil ; Nephotettix virescens ; rice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé De nombreux essais en plein champ à l'I.R.R.I. ont révélé une réduction du T.V. (tungro virus) transmis par (Nephotettix virescens) sur des parcelles de riz sensible non-traitées, entourées de parcelles pulvérisées périodiquement avec de l'essence de graines de neem (Azadirachta indica). L'essence de neem a une forte odeur d'ail, perceptible à distance. Nous avons examiné l'effet de l'odeur d'essence de neem sur le comportement alimentaire deN. verescens, grâce à un dispositif électronique et un colorant spécifique de la lignine. Sur du riz maintenu dans une enceinte imprégnée d'odeur d'essence de neem, nous avons constaté une diminution de la consommation de phloème, une augmentation significative de la fréquence des piqûres et une augmentation de temps de salivation et d'absorption de xylème. Ces altérations du comportement alimentaire provoquées par l'odeur d'essence de neem peuvent expliquer la diminution de la fréquence du T.V. spécifique du phloème dans des champs de riz non-traités, entourés de champs pulvérisés avec de l'essence de neem.
    Notes: Abstract Using an electronic device and a lignin-specific dye, the feeding behaviour of the green leafhopper,Nephotettix virescens (Distant), (Homoptera: Cicadellidae) was monitored on rice plants kept in an arena permeated with the odour of neem (Azadirachta indica A. Juss) seed oil. The garlicky odour of neem oil disrupted the normal feeding behaviour of the leafhopper. Phloem feeding byN. virescens on rice plants kept in an arena permeated with odour of 6, 12, or 25% neem oil was significantly reduced compared with that on control plants kept in an arena with paraffin oil or 1.66% aqueous ‘Teepol’ solution. Reduced intake from phloem was associated with a significant increase in the insect's probing frequency and an increase in durations of salivation and xylem ingestion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00629315
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...