Sökning: "Hymenoptera"
Visar resultat 11 - 15 av 17 uppsatser innehållade ordet Hymenoptera.
11. Importance of temperature for the willow bodyguard Perilitus brevicollis
Magister-uppsats, SLU/Dept. of EcologySammanfattning : The influence of temperature on the performance of the willow bodyguard, Perilitus brevicollis Haliday, 1835 (Hymenoptera: Braconidae) as well as the impact of temperature and parasitism on its host feeding capacity were assessed. The study also aimed at identifying the similarities and differences among two populations (Swedish and Irish) with regards to parasitoid diversity, size and parasitism rate. LÄS MER
12. 137Cesium i myrsamhällen i Gävleborgs län 24 årefter Tjernobylolyckan
Kandidat-uppsats, SLU/Dept. of Soil and EnvironmentSammanfattning : 24 years have passed since the Chernobyl accident when radionuclides were spread over largeareas of Europe, including the Scandinavian countries. Today, measurable activities of 137Csare still observed in many Swedish ecosystems. LÄS MER
13. Steklar som angriper rosor
M1-uppsats, SLU/Dept. of Plant Protection BiologySammanfattning : Släktet Rosa, rosor, är en mycket populär kulturväxt med en lång historia av växtförädling. Tyvärr uppskattas de inte bara utav oss människor, utan även utav flera olika skadegörare. Ordningen steklar, Hymenoptera, innehåller flera arter som angriper rosor. LÄS MER
14. Olfactory responses of the parasitic wasp, Trybliographa rapae (Hymenoptera: Figitidae)
Master-uppsats, SLU/Dept. of Plant Protection BiologySammanfattning : Delia flies (Diptera: Anthomyiidae) are economically important pests in several horticultural crops. The control is commonly relying on chemical insecticides, though there are possibilities with biological control from the natural enemies in the field. LÄS MER
15. Gamla tallars betydelse för biologisk mångfald på Gotland
Kandidat-uppsats, Avdelningen för BiologiSammanfattning : Modern methods for managing pine (Pinus sylvestris) create homogenized forests. This decreases nature’s potential for biodiversity and might threaten species in need of different types of milieu. The main purpose of this study was to investigate how important older pine trees are for biodiversity. LÄS MER