Sökning: "leaf beetle"

Visar resultat 1 - 5 av 11 avhandlingar innehållade orden leaf beetle.

  1. 1. Spatial patterns in the interaction between Salix triandra and associated parasites

    Författare :Lena Niemi; Anders Wennström; Lars Ericson; Keith Clay; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Gonioctena linnaeana; host-parasite interactions; leaf beetle; local adaptation; Melampsora amygdalinae; phenolics; pathogens; plant host; secondary chemistry; Terrestrial ecology; Terrestisk ekologi;

    Sammanfattning : This thesis focuses on mechanisms and processes underlying spatial patterns of resistance and virulence and on local adaptations in plant–parasite interactions. The model system used comprises the plant host Salix triandra, the pathogenic rust fungus Melampsora amygdalinae, the leaf beetle Gonioctena linnaeana, and the galler Pontania triandrae. LÄS MER

  3. 2. Conservation biological control of insect pests in two horticultural crops : a study of the cabbage root fly Delia radicum and the lily leaf beetle Lilioceris lilii

    Författare :Ulf Nilsson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  4. 3. Omnivore population dynamics and trophic behavior : applications for sustainable willow short rotation coppice

    Författare :Anna-Sara Liman; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Plant traits can mediate the interactions between plant feeding trophic omnivores and their herbivore prey via density effects and by altering the omnivore’s trophic behavior (plant vs. prey feeding). LÄS MER

  5. 4. Behavioural mechanisms behind aggregation in a tritrophic perspective

    Författare :Jörg Stephan; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Gregarious organisms need to handle the trade-off between positive effects of group living and increasing food competition. The gregarious Phratora vulgatissima, a specialist leaf beetle on willow in Europe and Asia, frequently reaches outbreak densities in natural stands and short rotation coppices. LÄS MER

  7. 5. Olfactory genomics of bark- and ambrosia beetles : Evolution and function of chemoreceptors

    Författare :Twinkle Biswas; Feromongruppen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Curculionidae; functional characterisation; odorant receptors ORs ; gustatory receptors; ionotropic receptors; orthologues; paralogues; olfactory sensory neurons; OR-ligand interaction;

    Sammanfattning : Insect behaviours, such as host and mate selection, are often mediated by chemical cues. The chemical cuesare detected by large and rapidly evolving families of chemoreceptors which include odorant receptors (ORs),gustatory receptors (GRs) and ionotropic receptors (IRs). LÄS MER