Sökning: "semiochemicals"

Visar resultat 1 - 5 av 16 avhandlingar innehållade ordet semiochemicals.

  1. 1. Structure elucidation of semiochemicals related to : Polygraphus poligraphus, Polygraphus punctifrons, Trioza apicalis, Whittleia retiella, Neodiprion edulicolus, Neodiprion scutellatus, Neodiprion knereri and Neodiprion virginianus

    Författare :Rizan Rahmani; Erik Hedenström; Dan Bylund; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Pheromone; semiochemicals; bark beetles; pest; Polygraphus poligraphus; Polygraphus punctifrons; Trioza apicalis; Whittleia retiella; Neodiprion spp.; analysis;

    Sammanfattning : .... LÄS MER

  3. 2. Identification and Syntheses of Semiochemicals Affecting Mnesampela privata and Trioza apicalis

    Författare :Anna Nilsson; Erik Hedenström; Anna-Karin Borg-Karlsson; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mnesampela privata; semiochemicals; pheromones; kairomones; 3Z; 6Z; 9Z -3; 6; 9-nonadecatriene; 3Z; 6Z; 9Z -3; 6; 9-heneicosatriene; carrot psyllid; Trioza apicalis; Organic chemistry; Organisk kemi;

    Sammanfattning : The Autumn gum moth, Mnesampela privata (Lepidoptera: Geometridae) is an endemic Australian moth whose larvae feed upon species of Eucalyptus. The moths favorite host plants are E. globulus and E. nitens which are the most important species used in commercial plantations of the Australian pulpwood industry. LÄS MER

  4. 3. Purification, Stereoisomeric Analysis and Quantification of Biologically Active Compounds in Extracts from Pine Sawflies, African Butterflies and Orchid Bees

    Författare :Joakim Bång; Erik Hedenström; Kristina Sjödin; Hans-Erik Högberg; Anna-Karin Borg-Karlsson; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Semiochemicals; sex pheromone; pine sawflies; Bicyclus; Euglossa; chiral separation; derivatisation; GC-­MS; Organic chemistry; Organisk kemi;

    Sammanfattning : Stereochemistry plays an important role in nature because biologically important molecules such as amino acids, nucleotides and sugars, only exist in enantiomerically pure forms. Semiochemicals carry messages, between the same species (pheromones) and between different species (allelochemicals). LÄS MER

  5. 4. The Scents of Nature : Identification and Synthesis of Bioactive Compounds Used in Insect Communication

    Författare :Erika Wallin; Erik Hedenström; Anna-Karin Borg-Karlson; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Semiochemicals; Sex pheromone; Bicyclus spp; Euglossa spp; Cimex hemipterus; Cimex lectularius; Kladothrips nicolsoni; Kladothrips rugosus; Drosophila melanogaster;

    Sammanfattning : Pest insects cause great financial losses in the forest and food industry every year. To fight these pests industries have used insecticides, which are sometimes harmful to nature and humans. LÄS MER

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

    Författare :Carina Eriksson; Christina Moberg; John Pickett; KTH; []
    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; Organic chemistry; 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