Essays about: "Coleoptera"

Showing result 26 - 30 of 32 essays containing the word Coleoptera.

  1. 26. Plume interaction and odour source spacing ofpheromone and non-host volatiles : : Behaviouraleffects on bark beetles and moths

    University essay from SLU/Dept. of Plant Protection Biology

    Author : Muhammad Binyameen; [2009]
    Keywords : Odour; plume structure; plume interactions; Spodoptera littoralis; S. litura; Ips typographus; Lepidoptera; Noctuidae; Coleoptera; Scolytidae; PID; orientation; sex pheromone; NHV ;

    Abstract : Insects have a remarkable ability to sense whether odours are released from one point source or from two closely separated ones. Therefore it is of interest to study the interactions of pheromone component odour plumes to affect the insect behaviour when the release points ofdifferent components are physically separated. READ MORE

  3. 27. Abundance of syrphid larvae in willow plantations : role of habitat type, prey (Phratora vulgatissima) availability and interactions with other natural enemies

    University essay from SLU/Dept. of Ecology

    Author : Hans Johansson; [2009]
    Keywords : intraguildpredation; hover fly; foraging behaviour; heteropteran; willow plantation; surrounding habitat; biocontrol; leaf-beetle; mirid; anthocorid;

    Abstract : A large number of hover fly species are as larvae effective predators and often feed on insect pests in plantations. The leaf-beetle Phratora vulgatissima is a common pest in willow plantations and the aim of this study is to study what may affect the presence of hover flies in this system. READ MORE

  4. 28. Biology of Lilioceris lilii(Coleoptera:Chrysomelidae) and the occurrence of their parasitoids in Sweden

    University essay from SLU/Dept. of Plant Protection Biology

    Author : Helena Kroon; [2009]
    Keywords : Lilioceris lilii; conservation biological control; Lemophagus errabundus; Lemophagus pulcher; Tetrastichus setifer; Diaparsis jucunda; Mesochorus lilioceriphilus; Lilioceris merdigera; Sweden; survey;

    Abstract : Sammanfattning: Liljebaggen, Lilioceris lilii (Scopoli) är den största skadegöraren på liljor tillhörande släktena Lilium och Fritillaria, och är ett problem i Sverige liksom i övriga Europa, Nord-Amerika och Asien. Skadan orsakas främst av larverna, men även av fullvuxna baggar, som äter på plantans blad, knoppar och blommor (Ernst, 2005). READ MORE

  5. 29. Sand pits as habitat for ground beetles (Carabidae) : does the area affect species number and composition?

    University essay from SLU/Dept. of Ecology

    Author : Lina Lönnberg; [2009]
    Keywords : sand pits; ground beetles Carabidae ; conservation; species-area relationship;

    Abstract : Sand pits are a valuable habitat which can hold many sand living species including several endangered ones. As many sand habitats with exposed sand are declining, sand pits have a potential as a substitute habitat. READ MORE

  6. 30. Indirect effects of mammalian herbivores on invertebrates in a river gradient of the Kruger National Park, South Africa

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : David Bell; [2008]
    Keywords : large herbivores; aavanna system; Kruger national park; insects response;

    Abstract : Savanna biomes have been heavily affected by fire suppression, and changed grazing and browsing regimes, caused by human interventions. As a result many biotic interactions, and ecosystem functions, have been altered. READ MORE