Sökning: "moth"

Visar resultat 36 - 40 av 52 uppsatser innehållade ordet moth.

  1. 36. Genetic differences in Lobesia botrana populations : related to host plant or geographic origin?

    Master-uppsats, SLU/Dept. of Plant Breeding (from 130101)

    Författare :Sophia Döös; [2013]
    Nyckelord :Lobesia botrana; Grapevine moth; pest; vineyard; AFLP; SSR; population genetics; Daphne gnidium;

    Sammanfattning : For the past six decades the model of geographical isolation has been dominating but recently there has been a renewed interest in the possibility of sympatric speciation. Races of phytophagous insects specializing on different species of host plants have often been studied for the purpose of solving the question of sympatric speciation. LÄS MER

  3. 37. Female mate choice and modulation of oviposition preference in the moth Spodoptera littoralis

    Kandidat-uppsats, SLU/Dept. of Biosystems and Technology (from 130101)

    Författare :Amanda Karlström; [2013]
    Nyckelord :Spodoptera littoralis; female mate choice; precopulatory assessment; host plant; selection; oviposition; Aedes aegypti; experience;

    Sammanfattning : In this thesis, two aspects of reproductive behaviour in the Egyptian cotton leafworm, Spodoptera littoralis (Lepidoptera:Noctuidae) were studied. The first was whether female moths make a mate choice based on precopulatory assessments of male mating partners, and the second whether larval food plant experience of an ectoparasite modulates the female choice of oviposition site. LÄS MER

  4. 38. Differences in host plant preferences and olfactory physiology between populations of the moth Spodoptera littoralis established in Egypt and Benin

    Master-uppsats, SLU/Dept. of Plant Breeding (from 130101)

    Författare :Louise Wyke; [2013]
    Nyckelord :Odour collection; electroantennographic recordings; Spodoptera littoralis strains; oviposition preferences; larval development; diets;

    Sammanfattning : This study was made to compare and distinguish any differences in olfactory recognition and host plant adaptation between two strains of cotton leaf worm, Spodoptera littoralis. The populations used were established in Egypt and Benin, Africa. LÄS MER

  5. 39. Mapping moth induced birch forest damage in northern Sweden, with MODIS satellite data

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Kristian Morin; [2013]
    Nyckelord :physical geography; topography; TIMESAT; Epirrita autumnata; geometrids; time series; MODIS; remote sensing; geography; birch forest; Earth and Environmental Sciences;

    Sammanfattning : Large synchronous outbreaks of herbivory geometrids is regularly occurring at 9-10 years intervals when they reach peak densities in the Fennoscandian birch forest, in the northern part of Scandinavia (Tenow 1972, Bylund 1995). Climate change is likely to increase the frequency, intensity and extent of the outbreak due to increasing temperatures in the area (Callaghan 2010, Heliasz et al. LÄS MER

  7. 40. Apparently obscure

    Kandidat-uppsats, Göteborgs universitet/HDK - Högskolan för design och konsthantverk

    Författare :Elina Nilsson; [2012-10-18]
    Nyckelord :;

    Sammanfattning : Through wing pattern, posture and movement, a harmless moth of the family Brenthia imitates an eight-eyed jumping spider. When an octopus of the species Thaumoctopus mimicus sense danger it can alter its appearance to that of a venomous sea snake. They are both drawing attention to themselves. Nevertheless, and because of this, they are protected. LÄS MER