Sökning: "Pine weevil"

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden Pine weevil.

  1. 1. Isolation, Synthesis and Structure-Activity Relationships of Antifeedants against the Pine Weevil, Hylobius Abietis

    Detta är en avhandling från Stockholm : KTH

    Författare :Carina Eriksson; KTH.; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Pine weevil; Hylobius abietis; semiochemicals; antifeedant; feeding deterrent; feeding stimulant; bark extract; carboxylic acid; piperidine alkaloids; structure-activity; cinnamic aldehyde; benzaldehyde; NATURAL SCIENCES Chemistry Organic chemistry; NATURVETENSKAP Kemi Organisk kemi;

    Sammanfattning : The large pine weevil, Hylobius abietis L., is a major insect pest on conifer seedlings in northern Europe. Due to its feeding newly planted trees get girdled, resulting in high seedling mortality (up to 80%). As a consequence great financial losses to the forest industry occur. LÄS MER

  2. 2. Pine weevil feeding in Scots pine and Norway spruce regenerations

    Detta är en avhandling från ; Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences

    Författare :Kristina Wallertz; Sveriges lantbruksuniversitet.; [2009]
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Damage caused by the pine weevil, Hylobius abietis (L) feeding on conifer seedlings is a major problem in reforested areas in many parts of Europe. The adult weevil feeds on the stem-bark of young seedlings, frequently killing a large proportion of newly planted seedlings. LÄS MER

  3. 3. Chemical signals in interactions between Hylobius abietis and associated bacteria

    Detta är en avhandling från Stockholm : Kungliga tekniska högskolan

    Författare :Karolin Axelsson; KTH.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Pine weevil; Hylobius; Rahnella; Pseudomonas; bacteria; fungi; metabolites; 2-methoxyphenol; 2-phenylethanol; Kemi; Chemistry;

    Sammanfattning : The pine weevil (Hylobius abietis L.) is one of the two topmost economically important insect pests in Swedish conifer forests. The damage increase in areas were the silvicultural practice is to use clear cuttings were the insects gather and breed. LÄS MER

  4. 4. Pine weevil feeding behaviour in relation to conifer plant properties

    Detta är en avhandling från ; Department of Ecology, Swedish University of Agricultural Sciences

    Författare :Frauke Fedderwitz; Sveriges lantbruksuniversitet.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : The pine weevil (Hylobius abietis (L.)) is a forest insect distributed over the Palearctic region. The adults feed on the phloem of young conifer plants causing high economic losses for the European forest industry. Still, there is very little knowledge about the structure of its feeding behaviour. LÄS MER

  5. 5. Volatiles of Conifer Seedlings Compositions and Resistance Markers

    Detta är en avhandling från Stockholm : KTH

    Författare :Astrid Kännaste; KTH.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Conifers; Norway spruce; Scots pine; Nalepella; Oligonychus ununguis; green leaf volatiles; terpenes; aromatics; benzenoids; SPME; induced defense reaction; NATURAL SCIENCES Chemistry Organic chemistry; NATURVETENSKAP Kemi Organisk kemi;

    Sammanfattning : Pine weevils cause major damage to newly planted conifer seedlings in reforestation areas. However, recent findings indicate that small (“mini”) seedlings, planted at the age of 7-10 weeks, are gnawed less by pine weevils than the larger, conventionally planted seedlings. LÄS MER