Search for dissertations about: "pest"

Showing result 11 - 15 of 90 swedish dissertations containing the word pest.

  2. 11. Attract, reward and disrupt: combining habitat manipulation and semiochemicals to enhance pest control in apple orchards

    Author : Joakim Pålsson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Agricultural intensification entails negative effects on natural enemy populations and the pest regulation services they provide. Habitat manipulation holds potential to control pests with less negative effects on the environment than conventional methods. READ MORE

  4. 12. The impact of forest on pest damage, pollinators and pollination services in an Ethiopian agricultural landscape

    Author : Ulrika Samnegård; Kristoffer Hylander; Peter Hambäck; Sileshi Nemomissa; Jaboury Ghazoul; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; agroforestry; Apoidea; Coffea arabica; crop pests; Ethiopia; forest cover; landscape ecology; moist afromontane forests; pollination; species composition; tropical agriculture; Plant Ecology; växtekologi;

    Abstract : The distribution of wild biodiversity in agroecosystems affect crop performance and yield in various ways. In this thesis I have studied the impact of wild biodiversity, in terms of trees and forest structures, on crop pests, pollinators and the pollination services provided in a heterogeneous landscape in southwestern Ethiopia. READ MORE

  5. 13. Pests and pest controlling organisms across tropical agroecological landscapes in relation to forest and tree-cover

    Author : Debissa Lemessa; Kristoffer Hylander; Peter Hambäck; Martin Entling; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; activity abundance; crop raiding; exclosure experiment; homegarden; leaf damage; predation; spatial scales; structural complexity; Plant Ecology; växtekologi;

    Abstract : A major challenge in agroecosystems is how to manage the systems so that it reduces crop pests and enhances natural pest control. This thesis investigates patterns of crop pests and top-down effects of birds and arthropod predators in relation to land-use composition across spatial scales. READ MORE

  6. 14. In the wake of the Green Revolution : Environmental and socioeconomic consequences of intensive rice agriculture - The Problems of weeds in Muda, Malaysia

    Author : Magnus Jirström; Institutionen för kulturgeografi och ekonomisk geografi; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; intensification; land degradation; rice agriculture; IPM integrated pest management ; Social geography; sustainable agriculture; Green Revolution; Socialgeografi;

    Abstract : The agricultural intensification strategies represented by the Green Revolution have since the mid-1960s had a very positive impact on food-grain production in Asia. Presently, however, a post-Green Revolution phase of declining growth in output and productivity is experienced in many of the areas where intensification took place. READ MORE

  7. 15. 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