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
Filter
  • Articles  (122)
  • Coleoptera  (122)
  • Springer  (122)
  • 2000-2004  (24)
  • 1980-1984  (98)
  • 1
    Electronic Resource
    Electronic Resource
    The feeding characteristics and development of larvae of a salvinia weevil Cyrtobagous sp. (1983)
    Springer
    Entomologia experimentalis et applicata 34 (1983), S. 291-296 
    Details
    ISSN: 1570-7458
    Keywords: Coleoptera ; Curculionidae ; Cyrtobagous ; Salvinia weevil ; Feeding characteristics of larvae ; Development of larvae ; Plant nutrition ; Temperature effects on development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Après leur naissance, les larves de Cyrtobagous sp. passent de 1 à 4 jours à brouter les racines, et de 0 à 9 jours dans les bourgeons de la plante hôte, Salvinia molesta, avant d'y creuser une galerie dans le rhizome. Bien que les larves aient été capables de survivre jusqu'à 38 jours en broutant les racines, quant elles furent privées de rhizome, elle ne purent achever leur développement. Quand les galeries furent commencées, le développement larvaire, entre 21° et 31°, dépendit de la température et de la teneur en azote de l'hôte. Les larves ne se développèrent pas à 17°. Une haute valeur nutritive de l'aliment consommé par les larves réduisit la durée du développement, mais n'influença pas la durée ultérieure de leur développement nymphal. Les lieux de prise de nourriture et les dégâts produits par des larves isolées furent précisés.
    Notes: Abstract Newly-emerged larvae of a salvinia weevil, Cyrtobagous sp. spent from 1–4 days browsing on the roots and from 0–9 days in the buds of the host plant, Salvinia molesta, prior to tunnelling into the rhizome of this aquatic weed. Although larvae were able to survive up to 38 days browsing on roots when rhizomes were withheld, they were unable to complete development. After tunnelling began, larval development between 21° and 31° was dependent on temperature and nitrogen levels in the host. Larvae failed to develop at 17°. High nutritional intake by the larvae reduced larval development time but did not influence duration of their subsequent pupal development. The feeding sites and plant damage produced by individual larvae were assessed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00186928
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Increasing the effectiveness of spring trap crops for Leptinotarsa decemlineata (2000)
    Springer
    Entomologia experimentalis et applicata 96 (2000), S. 193-204 
    Details
    ISSN: 1570-7458
    Keywords: cultural controls ; dispersal ; Colorado potato beetle ; Coleoptera ; Chrysomelidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Insecticide resistance problems have increased interest in trap crops as a cultural control strategy for overwintered Colorado potato beetle adults, Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae). Growers in the north central United States have noticed and treated concentrations of adults at the edge of some of their potato fields each spring. Based on sampling in commercial potato fields over a 2-year period, early planted fields that are adjacent to the previous year's potato crop are most likely to have concentrations of adults at the field edge. Frequency of fields with significantly more adults at the edges than in the center sections as well as adult population density in the center sections of fields declined with both distance from the previous potato field and later planting date. The effects of both physical and chemical barriers to movement into potato fields from the field edges were studied in small plot trials and at the edges of commercial potato fields. In small plot trials, physical barriers had a greater impact than chemical barriers on adult beetle movement from a potato trap crop to the protected potatoes beyond the barrier. Barrier treatments reduced beetle numbers in and just beyond the barrier in commercial fields, but the effects were localized and no significant reduction of beetles was observed further into the field. Beetle flight was hypothesized to be responsible for the localized effects of barrier treatments and the lack of edge concentrations in later planted and more distantly rotated fields. In field studies, larger potato plants attracted more colonizing potato beetles than smaller plants. Attracting Colorado potato beetles to trap crops containing potato plants that were larger than those in the remainder of the field, however, provided no significant reduction of beetles in the remainder of the field. We found little opportunity to reduce beetle populations with trap crops at the edges of potato fields without controlling the adults in the trap crop itself. Growers can exploit naturally occurring concentrations of adults at the edges of early and adjacent potato plantings if they are prepared to monitor and regularly treat the field edges.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004009901244
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Behavioural responses of Oryzaephilus surinamensis, Tribolium castaneum and Tribolium confusum to naturally and artificially damaged durum wheat kernels (2000)
    Springer
    Entomologia experimentalis et applicata 94 (2000), S. 195-200 
    Details
    ISSN: 1570-7458
    Keywords: stored-products ; Coleoptera ; primary pests ; secondary pests ; behaviour ; host selection ; wheat kernel volatiles ; damaged kernels
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Observations on behavioural activity involved in the host selection by secondary pests of stored grains, Oryzaephilus surinamensis (Linnaeus), Tribolium castaneum (Herbst) and Tribolium confusum J. du Val, with respect to intact and mechanically or naturally damaged kernels are reported. Our results indicate that the attraction of secondary pests is facilitated by broken grain kernels, which resulted from either mechanical damage during harvesting and/or binning procedures, or the feeding activity of primary insect pests. Insect damaged kernels were more attractive to O. surinamensis, T. castaneum and T. confusum than whole kernels; in addition insect damaged kernels elicit more attractiveness than mechanically split kernels. The damage caused by primary pests, such as Rhyzopertha dominica (Fabricius) and Sitophilus oryzae (Linnaeus), on whole kernels may facilitate colonization by secondary pests, which continue damaging the cereals. O. surinamensis, T. castaneum and T. confusum utilize the grain volatile odours to distinguish whether the grain kernels of the stored cereals are damaged mechanically or by insects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003929810978
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Effect of the ecdysone agonists, methoxyfenozide and tebufenozide, on the lady beetle, Coleomegilla maculata (2000)
    Springer
    Entomologia experimentalis et applicata 94 (2000), S. 103-105 
    Details
    ISSN: 1570-7458
    Keywords: ecdysone agonists ; methoxyfenozide ; tebufenozide ; Ostrinia nubilalis ; Coleomegilla maculata ; Coleoptera ; Coccinellidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003926704520
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Selection of hibernation sites by Anthonomus pomorum: preferences and ecological consequences (2000)
    Springer
    Entomologia experimentalis et applicata 95 (2000), S. 241-249 
    Details
    ISSN: 1570-7458
    Keywords: Anthonomus pomorum ; apple blossom weevil ; Coleoptera ; Curculionidae ; hibernation ; mortality ; dispersal ; mark-release-recapture ; apple orchard
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The apple blossom weevil, Anthonomus pomorum (L.) (Coleoptera: Curculionidae), has a long period of aestivo-hibernation in the adult stage lasting from summer to early spring of the following year. Potential hibernation sites within an apple orchard consist of high-stem rough-bark trees or dwarf smooth-bark trees. Field release-recapture experiments in 2 consecutive years showed that 64 and 47% of the weevils remained in the vicinity of the release sites in an area of high-stem trees and dwarf trees, respectively. The dispersing weevils moved over an average distance of 5.5 m in the dwarf tree area, as compared to 3.8 m in the high-stem tree area. The prevalent direction of dispersal was along tree rows in both areas. Some weevils displayed, after release in mid-July, a directional dispersal to the adjacent forests. Others, released in the dwarf tree area, dispersed towards the area of high-stem rough-bark apple trees. Experiments simulating various hibernation sites demonstrated that the litter of dry leaves was the most preferred overwintering shelter, yielding a relatively high survival rate. Branches with rough bark ranked second, while branches with smooth bark, grass and pure soil were not favourable for overwintering. Flight tendency in newly emerged weevils of summer generation was significantly higher in June/July than in August/September. This corresponds to the dispersal behaviour in the field. The timing of spring colonisation of apple trees was similar for weevils overwintering within the orchard and for those from outside. These results suggest that modern, dwarf apple orchards offer unfavourable conditions for overwintering, but that the relatively small proportion of weevils which manage to reach the adjacent forests find optimal hibernation sites there.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004046801897
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Ecdysteroids during pupal development of female Xyleborus ferrugineus (1981)
    Springer
    Entomologia experimentalis et applicata 30 (1981), S. 151-156 
    Details
    ISSN: 1570-7458
    Keywords: Xyleborus ferrugineus ; pupae ; ecdysteroids ; pharate adult ; radioimmunoassay ; Coleoptera ; Scolytidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Der Ecdysteroidtiter weiblicher Puppen von Xyleborus ferrugineus (Fabr.) wurde geschätzt, indem ganze Tiere homogenisiert und radioimmunologisch untersucht wurden. Ein ausgeprägtes Maximum an Ecdysteroiden wurde bei 36 Stunden Puppenent-wicklung beobachtet (743 pg/mg Körpergewicht). Der Titer nahm ab auf 299 pg/mg im Pharatstadium und auf 193 pg/mg unmittelbar vor Schlüpfen der Adulten. Qualitative Studien mit HPLC ergaben in frischen Puppen ein Verhältnis von 3:1 Ecdyson zu 20-Hydrooxyecdyson. Pharatstadien enthielten vor allem 20-Hydrooxyecdyson. Das beobachtete einzige Maximum im Titer stimmt überein mit den Resultaten bei andern untersuchten Coleopteren.
    Notes: Abstract Ecdysteroid titers were estimated on the whole body homogenates of Xyleborus ferrugineus (Fabr.) female pupae during development by radioimmunoassay. A distinct peak of ecdysteroids was observed at 36-hr pupal development (743 pg/mg body wt). Titer declined to 299 pg/mg by the pharate adult stage and to 193 pg/mg body wt just before adult emergence. Qualitative studies by HPLC revealed a ratio of 3:1 ecdysone to 20-hydroxyecdysone in the initial pupal stage. Pharate adults had mainly 20-hydroxyecdysone. The observed single peak in ecdysteroid titer agrees with findings in other studied coleopteran species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300880
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Nested Coleoptera and Orthoptera on sand dunes in the Basin and Range Province of western North America (2000)
    Springer
    Journal of insect conservation 4 (2000), S. 33-43 
    Details
    ISSN: 1572-9753
    Keywords: biogeography ; nested subsets ; sand dune ; Coleoptera ; Orthoptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract The sand dunes of the Basin and Range Province of western North America contain obligate and endemic species of Coleoptera and Orthoptera. These dune habitats represent islands on which the isolated insular faunas are in a state of relaxation. The calculated ‘temperature’ metric used in this study reflects the relative measure of disorder, by which the degree of nestedness can be determined. Sixteen dunes in the Basin and Range Province are shown to comprise a nested subset of obligate Coleoptera and Orthoptera. These sixteen sand dunes remain nested even when the endemic species are excluded from the analysis. The absence of endemic species slightly decreased the calculated ‘temperature’ of the island-dune archipelago. Therefore, endemic species present in the sand dunes do not significantly contribute to the high degree of nestedness of dune obligate Coleoptera and Orthoptera in the Basin and Range Province. The dunes can also be separated into five distinct sub-basins, two of which contain only one sand dune. These sub-basins are not significantly nested, but together define the nested structure of the Basin and Range Province.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009699431838
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Maximum feeding potential of larvae and adults ofthe scale insect predator, Chilocorus nigrituswith a new method of estimating food intake (2000)
    Springer
    BioControl 45 (2000), S. 295-310 
    Details
    ISSN: 1573-8248
    Keywords: Biological control ; Coccinellidae ; Coleoptera ; Diaspididae ; Abgrallaspis cyanophylli ; Chilocorus nigritus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A method of estimating the weight ofindividual Abgrallaspis cyanophylli (Signoret)without the need for removal from the host plant isdescribed. Using this method, which enables accurateestimations of scale insect weight by measuring lengthand relating it to a previously determined regressionmodel, maximum feeding potential in male and femaleChilocorus nigritus (F.) adults was examined atvarious constant temperatures over the range of 13 to30 °C and at a cycling temperature of 12 h/12 hat 14/30 °C (r.h. in the range of 62 to 68%). Mean daily potential food intake varied from 0.097 mg/day at 13 °C to 1.432 mg/day at 30 °C.However, intake at the cycling temperature was significantly higher than that at constant temperatures (1.98 mg/day). At 15, 20 and 30 °C there were no significant differences between male and female potential food requirements whilst at temperatures in the mid range, there was a considerable increase in female potential voracitywhen compared to that of the males. Maximum potentiallarval food requirement for development at 26 °Cand 62% r.h. in C. nigritus was also estimatedusing the above method. A mean of 16.24 mg of Abgrallaspis cyanophylli (Signoret) was required forlarvae of both sexes to complete development. Thisstudy suggests that C. nigritus would be mostefficient as a biological control agent if used inglasshouses with a mean daily temperature above22 °C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009953005065
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Impact of defoliation by the biocontrol agentZygogramma bicolorataon the weed Partheniumhysterophorus in Australia (2000)
    Springer
    BioControl 45 (2000), S. 501-512 
    Details
    ISSN: 1573-8248
    Keywords: biocontrol ; defoliation ; herbivory ; impact assessment ; weed ; Asteraceae ; Coleoptera ; Parthenium hysterophorus ; Zygogramma bicolorata
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The leaf-feeding beetle Zygogrammabicolorata Pallister was introduced from Mexico intoAustralia in 1980 as a biocontrol agent for the weedParthenium hysterophorus L. (Asteraceae). Z. bicolorata became abundant in 1990, and since 1992there has been regular outbreaks resulting in thedefoliation of the weed in central Queensland. In thisstudy we evaluated the impact of defoliation by Z. bicolorata on P. hysterophorus from 1996 to1998. Z. bicolorata caused 91–100% defoliationresulting in reductions in weed density by 32–93%,plant height by 18–65%, plant biomass by 55–89%,flower production by 75–100%, soil seed-bank by13–86% and seedling emergence in the following seasonby 73–90%. At sites with continued outbreaks ofZ. bicolorata, it is expected that the existing soilseed-bank will be minimised, resulting in reduceddensity of parthenium in 6 to 7 years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026528304473
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    The effects of temperature, relative humidity and hostplant on the behaviour of Stethorus punctillum as apredator of the two-spotted spider mite, Tetranychusurticae (2000)
    Springer
    BioControl 45 (2000), S. 155-164 
    Details
    ISSN: 1573-8248
    Keywords: biological control ; locomotory and predatory activity ; Acari ; Coccinellidae ; Coleoptera ; Tetranychidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The predatory behaviour of Stethoruspunctillum larvae was studied on the two-spottedspider mite (Tetranychus urticae), in order toassess how it responded to temperatures and relativehumidities typical of glasshouse conditions on fouredible crop plant species. Locomotory activity(distance covered, time spent walking, walking speed,angular velocity, and turning rate) was recorded at20, 25 and 30 °C and relativehumidity levels of 33%, 65% and 90% RH on tomato,pepper, aubergine and cucumber and analysed usingvideo/computer techniques. The results show thatactivity of S. punctillum significantly increased athigher temperatures. Host plant species also stronglyinfluenced the performance of the predator, which wasmost active on pepper and tomato and least active onaubergine. Relative humidity had no significantinfluence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009982610696
    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...