Essays about: "moth"

Showing result 31 - 35 of 44 essays containing the word moth.

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

    University essay from SLU/Dept. of Plant Breeding (from 130101)

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

    Abstract : 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. READ MORE

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

    University essay from SLU/Dept. of Biosystems and Technology (from 130101)

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

    Abstract : 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. READ MORE

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

    University essay from SLU/Dept. of Plant Breeding (from 130101)

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

    Abstract : 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. READ MORE

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

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

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

    Abstract : 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. READ MORE

  6. 35. Insekter i hårt törskateangripna ungtallbestånd i Norrbotten : skadeinventering och artbestämning

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Andreas Engström; [2012]
    Keywords : Törskate; Cronartium flaccidum; Peridermium pini; tall; Pinus sylvestris; insekter; mott; Dioryctria spp.; allmän tallbarkvecklare; Cydia coniferana; Cronartium rust; Scots pine; insects; moths; Cydia coniferana;

    Abstract : Sedan i början av 2000-talet har nordligaste Sverige drabbats hårt av törskateangrepp och det är konstaterat att skadorna framförallt har orsakats av den värdväxlande varianten C. flaccidum. READ MORE