Essays about: "Rhopalosiphum padi L."

Found 5 essays containing the words Rhopalosiphum padi L..

  1. 1. Naturliga fiender till havrebladlöss vid en kantzon med varierad vegetation : en fältstudie av naturliga fienders förekomst vid två olika utformningar av vegetation och deras attraktion till metylsalicylat

    University essay from SLU/Dept. of Ecology

    Author : Louise Malmquist; [2017]
    Keywords : Araneae; Carabidae; Coccinellidae; ekosystemtjänster; havrebladlöss; integrerat växtskydd; IPM; metylsalicylat; MeSA; Staphylinidae;

    Abstract : Många växtskadegörare finns inom jordbruket som kan orsaka skördeförluster. Dessa kan bland annat bekämpas med kemiska växtskyddsmedel. Pågående utfasning av aktiva substanser kräver dock utveckling av alternativa bekämpningsmetoder. 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. Responses of aphids to semiochemicals released from ladybirds

    University essay from SLU/Dept. of Ecology

    Author : Feng Youren; [2012]
    Keywords : Rhopalosiphum padi L.; Coccinella septempunctata L.; residues; volatiles; track; aphid settling; aphid olfactory response;

    Abstract : Predatory ladybirds, as natural enemies of aphids, can influence their prey in various ways, for example by consuming them or making the aphids drop off from their host plants. In this study, I have examined whether aphids can respond to the semiochemicals released from ladybirds. READ MORE

  5. 4. 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

  6. 5. Induction of pathogenesis-related genes, PR-17a and N-methyltransferase, in barley infested by the aphid Rhopalosiphum padi

    University essay from Institutionen för livsvetenskaper

    Author : Naima Grönberg; [2006]
    Keywords : ;

    Abstract : Plants produce a large diverse array of organic compounds that may function in protection against pathogens. Diverse antifungal compounds were reported to exist in barley (Hordeum vulgare L.); the indole alkaloid, gramine, and the pathogenesis-related proteins are some of them. READ MORE