Search for dissertations about: "Hylobius"

Showing result 1 - 5 of 11 swedish dissertations containing the word Hylobius.

  1. 1. Microbes Associated with Hylobius abietis A Chemical and Behavioral Study

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Muhammad Azeem; Anna Karin Borg-Karlson; Irena Valterová; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Hylobius; Ewingella; Penicillium; Heterobasidion; Bacteria; Fungi; Bark; Forest waste; Metabolites; Styrene; Methyl salicylate.;

    Abstract : This thesis is based on three inter-related studies: the first part deals with the microbial consortium, the identification of microbes and their volatiles, the second part deals with the study of bio-chemical control methods of two conifer pests; the pine weevil Hylobius abietis (L.) and the root rot fungi Heterobasidion spp. READ MORE

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

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Karolin Axelsson; Jenny Lindh; Anna-Karin Borg-Karlson; Gunaratna Kuttuva Rajarao; Benedicte Albrectsen; []
    Keywords : 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;

    Abstract : 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. READ MORE

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

    University dissertation from Stockholm : KTH

    Author : Carina Eriksson; Christina Moberg; John Pickett; [2006]
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 4. Syntheses of Allelochemicals for Insect Control

    University dissertation from Stockholm : Kemi

    Author : Olof Smitt; [2002]
    Keywords : isoprenoids; natural product synthesis; allelochemicals; kairomones; allomones; bisabolane terpenoids; Hylobius abietis; germacrane terpenoids; Neodiprion sertifer; stereoselective synthesis;

    Abstract : This thesis describes the synthetic preparation of somecompounds, which can serve as chemical signals for use in thedevelopment of control methods for pest insects. The compoundssynthesised are of the isoprenoid type and of two kinds:carvone derivatives and germacranes. READ MORE

  5. 5. Chemical defence in Norway spruce

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Marie Danielsson; Anna-Karin Borg-Karlson; Anders Backlund; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; volatiles; terpenes; green leaf volatiles; stilbenes; stress response; nepetalactone; Picea abies; Hylobius abietis; Cinara pilicornis; Oligonychus ununguis; Heterobasidion annosum; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi;

    Abstract : Norway spruce (Picea abies) responds to stress by biosynthesis of chemical substances, which can deter invading insects or pathogens. Some of these substances are volatile and can be emitted to the surroundings while others are accumulated within the tree. READ MORE