Search for dissertations about: "Neodiprion sertifer"

Showing result 1 - 5 of 6 swedish dissertations containing the words Neodiprion sertifer.

  2. 1. Behaviour of Pine Sawflies in Relation to Pheromone-Based Pest Management

    Author : Fredrik Östrand; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Animal ecology; effective sampling area; mark-release-recapture; climate; longevity; sampling range; Symphyta; Hymenoptera; monitoring; dispersal; polyandry; mating disruption; integrated pest management; behaviour; sex pheromone; Neodiprion sertifer; Diprionidae; Djurekologi; Zoology; Zoologi; Silviculture; forestry; forestry technology; Skogsvetenskap; skogsbruk; skogsteknik;

    Abstract : Pine sawflies (Hymenoptera: Diprionidae) are severe pine defoliators. This thesis investigated sawfly behaviour related to the use of pheromones in integrated pest management, including monitoring with pheromone traps and mating disruption. READ MORE

  4. 2. Syntheses of Allelochemicals for Insect Control

    Author : Olof Smitt; KTH; []
    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. 3. Stereoselective synthesis of semiochemicals related to pine sawflies

    Author : Ove Nordin; KTH; []
    Keywords : ;

    Abstract : This thesis describes the stereochemistry and charactericsof (–)-1,6-germacradien-5-ol, isolated from the larvaldefence substance of the pine sawflyNeodiprion sertiferand from the needles of Scots pine,Pinus sylvestris. The conformational behaviour of thissesquiterpene alcohol was investigated by molecular mechanicsstudies (MM2) and NMR. READ MORE

  6. 4. Interactions between ungulates and forest insects

    Author : Michelle Nordkvist; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In forest ecosystems ungulates and insect herbivores often co-occur and utilise the same host trees. Herbivores that share a host plant can indirectly affect each other through plant induced responses. Such changes may affect plant growth, interactions with other species, and population dynamics. READ MORE

  7. 5. The effect of temperature on trophic interactions : Implications for the population dynamics of a forest pest insect in a warmer climate

    Author : Ida Kollberg; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Increase in temperature related to climate change will have consequences on the performance of organisms. Insects could be expected to respond more than other organism groups because they are ectotherms. READ MORE