Essays about: "bird cherry-oat aphid"

Showing result 1 - 5 of 6 essays containing the words bird cherry-oat aphid.

  1. 1. Kan odlingslandskapets diversitet påverka angreppet av havrebladlus i vårkorn?

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

    Author : Björn Larsson; [2016]
    Keywords : havrebladlus; vårkorn; Västra Götaland; predatorer; biodiversitet; gröddiversitet; Shannons diversitetsindex;

    Abstract : Detta arbete belyser problematiken med skadegörare i spannmål och vissa möjligheter som finns för att minska trycket av skadegörare genom omgivningsfaktorer som gynnar skadegörarnas naturliga fiender. Frågeställningarna och hypoteserna som avhandlas är: Kan gröddiversitet påverka förekomsten av bladlöss i vårkorn och vilken påverkan har den odlade arealen vall och spannmål för förekomsten av havrebladlöss i vårkorn. READ MORE

  3. 2. The role of midfield islets in pest control

    University essay from Institutionen för naturgeografi och kvartärgeologi (INK)

    Author : Sabine Sigfridsson; [2013]
    Keywords : Agriculture; aphid interaction; biological pest control; bird cherry-oat aphid; cereal aphids; ecosystem services; landscape diversity; midfield islets; natural enemies; non-crop habitats; predators; Prunus padus; Rhopalosiphum padi; Biodiversitet; biologisk bekämpningsstrategi; ekosystemtjänster; havrebladlus; heterogent landskap; hägg; jordbruk; landskapsekologi; lusreducering; naturliga fiender; nyttoinsekter; predatorer; Prunus padus; Rhopalosiphum padi; skadeinsekter; åkerholmar.;

    Abstract : During last century rising populations and changed market preferences have led to large structuralchanges in agriculture in the developed world. Most conventional cultivation methods involve theproduction of few monoculture crops within a homogenous landscape, where pesticides and inorganicfertilizers are used to increase yields. READ MORE

  4. 3. Plant chemical signalling affecting aphid-plant interactions

    University essay from SLU/Horticulture (until 121231)

    Author : Erika Qvarfordt; [2009]
    Keywords : plant-plant interactions; barley; aphids; root exudates; induced defence;

    Abstract : Aphid-plant interaction are complex processes where much still remains to be explored. This project tested the capacity of aphid-infested barley, Hordeum vulgare (L.), to induce defencelike responses in neighbouring plants via chemical signals, making them less acceptable to the bird cherry-oat aphid Rhopalosiphum padi (L.). READ MORE

  5. 4. Regulation of callose synthases and beta-1,3-glucanases during aphid infestation on barley cv. Clipper

    University essay from Institutionen för livsvetenskaper

    Author : Izabela Anna Cierlik; [2008]
    Keywords : barley; aphid; callose;

    Abstract : Plant resistance hypothesis says that under a period of time when a plant is exposed to powerful herbivore attack it will prioritise defence as a major metabolic function. In theory, induced plant defence (resistance) will provide opportunities for this organism to “invest” in other functions, in example growth when attackers are absent. READ MORE

  6. 5. Analysis of gene expression in barley upon aphid attack

    University essay from Institutionen för livsvetenskaper

    Author : Nicolas Richerioux; [2007]
    Keywords : aphids; barley; R. padi; defense reactions; gene regulation; genomic PCR;

    Abstract : Since plants can not escape their predators by walking, they use some other defense systems, like induction or repression of defense genes. A microarray experiment performed with barley attacked by the bird cherry-oat aphid (Rhopalosiphum padi), led to the hypothesis that contig 16360 (similar to ser/thr kinases) could be linked with the resistance of barley against R. READ MORE