Sökning: "Lepidoptera"

Visar resultat 21 - 25 av 28 uppsatser innehållade ordet Lepidoptera.

  1. 21. Effect of patch heterogeneity on oviposition in two lepidopteran Brassica pests

    Kandidat-uppsats, SLU/Dept. of Ecology

    Författare :Tove Maria Nilsson; [2011]
    Nyckelord :Pieris brassicae; Plutella xylostella; Brassica oleracea; oviposition; host plant; egg distribution; patch heterogeneity;

    Sammanfattning : The plant family of Brassicaceae is widespread around the world and many members of the family are important food and oil-seed crops. There are many insect pests specialized on brassicaceous crops and interactions between crop and pest are well studied. LÄS MER

  3. 22. Evaluating six crop mixes used for game fields in southwest Sweden : biomass production, fallow deer preference and species diversity

    Magister-uppsats, SLU/Dept. of Ecology

    Författare :Elin Grönberg; [2011]
    Nyckelord :arthropods ; biomass production; biomass consumption; crop mix; Dama dama; fallow deer; game field; species diversity index;

    Sammanfattning : Game fields are one way to divert animals away from sensitive areas, create shelter and forage, and also to increase the biological diversity. In this study I investigated how the plant composition in six different crop mixes used for game fields affected the biomass production, biomass consumption and biological diversity at the Koberg estate in southwestern Sweden. LÄS MER

  4. 23. Response to olfactory stimuli in gregarious Pieris brassicae caterpillars

    Kandidat-uppsats, SLU/Dept. of Ecology

    Författare :Louise Malmgren; [2011]
    Nyckelord :olfaction; olfactometer; caterpillar; host search; Pieris brassicae; Lepidoptera; Brassica oleracea; cauliflower; broccoli; cabbage; stimuli;

    Sammanfattning : Insects search primarily to find food, egg-laying sites, resting sites or conspecifics. Understanding the search behaviour of insects at the point when they are not in contact with the host is relevant to for instance the control of pest species. LÄS MER

  5. 24. Attraction of Wasp and Bumblebee Lures

    Kandidat-uppsats, Institutionen för naturvetenskap, NV

    Författare :Elisabeth Carlsson; [2011]
    Nyckelord :;

    Sammanfattning : The introduced common wasp, Vespula vulgaris, is causing problems around the world, particularly on New Zealand. The wasps have big effects on the native animal life and the community structure. One research group on New Zealand has tried out a lure that attracts Vespula spp. LÄS MER

  7. 25. Retention of stumps on wet ground at stump-harvest and its effects on saproxylic insects

    Master-uppsats, SLU/Dept. of Forest Products

    Författare :Clémentine Ols; [2011]
    Nyckelord :stump harvesting; wet ground; saproxylic insects; biodiversity; stubbrytning;

    Sammanfattning : Low stumps represent on their own up to 80% of the dead wood remaining on clear cuts and therefore supply suitable habitat for saproxylic insects i.e. insects depending on dead wood for their survival. LÄS MER