Library

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
    Geometriae dedicata 58 (1995), S. 313-326 
    ISSN: 1572-9168
    Keywords: 51M10
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper we find conditions in order to construct hyperbolic right-angledN-gons with the lengths ofN-3 sides given. Explicit formulae for the length of a side in terms of the lengths ofN-3 non-adjacent sides are obtained.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    BioControl 33 (1988), S. 403-412 
    ISSN: 1573-8248
    Keywords: Lysiphlebus testaceipes ; Aphis citricola ; aphid parasitoids ; continental Portugal ; Lysiphlebus testaceipes ; Aphis. citricola ; parasitoïdes de puceron ; Portugal continental
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Lysiphlebus testaceipes (Cresson) est un parasitoïde exotique introduit dans le Sud de la France depuis 1973–74, qui a progressivement envahi l'Italie et l'Espagne. Sa présence dans le Sud du Portugal a été signalée en 1985, surAphis nerii Boyer de Fonscolombe. En 1986, il s'étend vers le Nord et on a signalé ce parasitoïde sur plusieurs hôtes, notammentAphis chloris Koch,Aphis citricola van der Goot,Aphis fabae Scopoli,Aphis frangulae Kaltenbach,Aphis gossypii Glover,A. nerii, Aphis parietariae Theobald,Aphis sedi Kaltenbach,Toxoptera aurantii (Boyer de Fonscolombe). En Méditerranée c'est la première fois qu'on rapporte le complet développement et un parasitisme considérable deL. testaceipes surA. citricola. Jusqu'ici on avait observé uniquement un développement incomplet et un pourcentage de parasitisme négligeable (Italie). La liste des hôtes et le développement deL. testaceipes mettent en évidence l'enrichissement du polymorphisme génétique des nouvelles populations. Les relations deL. testaceipes avec les parasitoïdes indigènes indiquent une dominance croissante du parasitoïde exotique.
    Notes: Abstract Lysiphlebus testaceipes (Cresson), an exotic parasitoid species introduced in 1973–74 into southern France and subsequently widespread over the whole mediterranean France, Italy and Spain has become established even in Portugal since 1985. It was found on the southern coast of Portugal parasitizingAphis nerii Boyer de Fonscolombe. In 1986 it spread towards the North, its host range expanded and now includesAphis chloris Koch,Aphis citricola van der Goot,Aphis fabae Scopoli,Aphis frangulae Kaltenbach,Aphis gossypii Glover,A. nerii, Aphis parietariae Theobald,Aphis sedi Kaltenbach,Toxoptera aurantii (Boyer de Fonscolombe). The proved complete development and a high parasitization ofL. testaceipes onA. citricola is the 1st case in the whole Mediterranean, from where only incomplete development and a negligible percentage of parasitization (Italy) have been reported. Both the host range composition and development ofL. testaceipes indicate an increase of genetic polymorphism in the established populations. Interspecific relations ofL. testaceipes and the indigenous parasitoid species indicate an increasing dominance of the exotic biocontrol agent.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...