Essays about: "pan trap"

Found 4 essays containing the words pan trap.

  1. 1. Partners in crime – How cabbage seed weevil assists brassica pod midge in damaging pods of winter oilseed rape in fields in Southern Sweden : how is insect abundance related to crop damage?

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

    Author : Sarah Heithausen; [2020]
    Keywords : monitoring; Ceutorhynchus obstrictus; Dasineura brassica; Brassica napus; Integrated Pest Management; economic threshold; pan trap; sticky trap;

    Abstract : The brassica pod midge (Dasineura brassicae) has emerged as an important pest causing problems in Winter Oilseed Rape (WOSR) (Brassica napus ssp. napus) production in Southern Sweden during recent years. Adult female D. brassicae oviposit into WOSR pods. READ MORE

  2. 2. The effect of ecological forest restoration on bumblebees (Bombus spp.) in the boreal forest

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Raisja Spijker; [2018]
    Keywords : bumblebee; Bombus spp.; forest restoration; abundance; species richness; species composition; boreal forest;

    Abstract : Insect pollinators are an important part of biodiversity, yet the number of pollinating insects is declining all over the world. Of all the wild plant species about 80% are reliant on insect pollinators, with bees being most important. One of the main causes behind the decline of insect pollinators is the loss and fragmentation of habitats. READ MORE

  3. 3. Effects of flower abundance and colour on pan-trap catches

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

    Author : Hilda-Linn Berglund; [2016]
    Keywords : Syrphidae; Apoidea; Bombus; Cetoniidae; Lepturinae; Trichius; pan-trap; hand-netting; flower colour; Blomflugor; bin; humlor; guldbaggar; blombockar; humlebaggar; färgskålar; håvning; blomfärger;

    Abstract : Pollinating insects are important for many plants and for the human population. To be able to monitor pollinators and assess improvements made for them, it is important to get information about pollinator population changes. Therefore, it is essential that the methods used to collect data are accurate (i.e. READ MORE

  4. 4. On the Properties of a Few Electron-Hole system in a Double One-dimensional Harmonic Trap

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik

    Author : Fan Pan; [2012]
    Keywords : Electron-Hole system; Few-body; CI methods; Exciton-like; Double one-dimension; harmonic trap; Physics and Astronomy;

    Abstract : One of the most important concepts in condensed matter physics is that of ``quasi particles''. The exciton is one such quasi particle. In semi-conductors, excitons are formed by the excitation of electrons from valence band to conduction band, which creates holes in the valence band. READ MORE