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Visar resultat 1 - 5 av 6 uppsatser som matchar ovanstående sökkriterier.

  1. 1. The role of agroforestry tree species in biocontrol of the cabbage pest Plutella xylostella : a field study in Kenya

    Kandidat-uppsats, SLU/Dept. of Ecology

    Författare :Nadja Kvick Nastaj; [2020]
    Nyckelord :agroforestry; Plutella xylostella; biocontrol;

    Sammanfattning : Pest control in agriculture is a necessity and the use of chemicals is the method by choice for most farmers. But the use of chemicals comes with a price; the pests develops resistance and the chemicals pollutes the environment. It is therefore of urgent importance to shift pest control from chemicals to other methods. LÄS MER

  3. 2. Biology of the diamondback moth (Plutella xylostella) and its future impact in Swedish oilseed rape production : a literature review

    Kandidat-uppsats, SLU/Dept. of Ecology

    Författare :Joakim Hermansson; [2016]
    Nyckelord :diamondback moth; Plutella xylostella; overwintering; climate; canola; oilseed rape; cosmopolitan pest; resistance; Brassica napus;

    Sammanfattning : The biology of the Diamondback moth, Plutella xylostella, and its impact on oilseed rape production is reviewed. The Diamondback moth, DBM, is a serious, migratory, pest and a problem worldwide because its larval stage has a ravenous appetite, which causes major economic losses in Brassica crops. LÄS MER

  4. 3. Plant defensive mechanisms against insect pests

    Kandidat-uppsats, SLU/Dept. of Plant Biology and Forest Genetics (until 131231)

    Författare :Joel Markgren; [2012]
    Nyckelord :Arabidopsis thaliana ; ethylene; feeding experiments; glucosinolate-myrosinase ; jasmonic acid; Plutella xylostella; priming; salicylic acid; Spodoptera littoralis ; trichomes;

    Sammanfattning : This study has focused on testing the following two hypotheses:• Pest resistant plants have higher levels and/or several different kinds of secondary metabolites. • Induced defensive systems in resistant plants are activated more rapidly than those of susceptible plants. LÄS MER

  5. 4. 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

  7. 5. Field margins vs. insecticides : factors affecting the density of predators attacking Plutella xylostella

    L3-uppsats, SLU/Dept. of Ecology

    Författare :Lina Grönberg; [2007]
    Nyckelord :predators; Plutella xylostella; diamondback moth; field margins; biological control; Nicaragua;

    Sammanfattning : Biological control provides a tool to reach goals such as maintaining sustainable agroecosystems and decreasing the use of pesticides. Studies show that generalist predators can reduce prey populations effectively and, thus, may function as good biocontrol agents. LÄS MER