Sökning: "Neodiprion sertifer"
Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Neodiprion sertifer.
1. Behaviour of Pine Sawflies in Relation to Pheromone-Based Pest Management
Sammanfattning : 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. LÄS MER
2. Syntheses of Allelochemicals for Insect Control
Sammanfattning : 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. LÄS MER
3. Stereoselective synthesis of semiochemicals related to pine sawflies
Sammanfattning : 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. LÄS MER
4. Interactions between ungulates and forest insects
Sammanfattning : 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. LÄS MER
5. The effect of temperature on trophic interactions : Implications for the population dynamics of a forest pest insect in a warmer climate
Sammanfattning : 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. LÄS MER