Population dynamics and population control of Galium aparine L.

    Research output: Thesisinternal PhD, WU

    Abstract

    <p>The population biology of <em>Galium aparine</em> L. needs to be better understood, in order to be able to rationalize decisions about the short- and long-term control of this weed species for different cropping practices.<p>A population dynamics model was developed to simulate the basic processes of the life cycle of <em>G. aparine</em> as influenced by environmental conditions. The effect of temperature, light, moisture, nitrate supply and soil structure on germination and emergence and on growth and seed production were investigated. Data were integrated in a model simulating field emergence and an ecophysiological model on crop-weed competition. The information was used to evaluate the effects of crop rotations, control levels, cultural measures and timing and choice of soil cultivation practices on the population dynamics of <em>G.</em><em>aparine.</em> The ecophysiological model of competition between <em>G. aparine</em> and sugar beet was extended to predict reductions in crop yield reduction and increases or decreases in the weed population on the basis of the actual situation in the field. The variation caused by weather conditions appeared to be small.<p>The results of simulations demonstrate the possibilities of reducing herbicide use to control <em>G.</em><em>aparine</em> in both the short and long term, by adapting crop rotation and cropping practice, increasing mechanical control in cereals and not controlling lateemerging <em>G. aparine</em> plants in sugar beet.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    Supervisors/Advisors
    • Rabbinge, R., Promotor, External person
    • Zonderwijk, P., Promotor, External person
    • van Groenendael, J.M., Promotor, External person
    Award date4 Jun 1993
    Place of PublicationS.l.
    Publisher
    Print ISBNs9789054851158
    Publication statusPublished - 1993

    Keywords

    • rubiaceae
    • weeds
    • population dynamics
    • plant protection
    • pesticides
    • galium aparine

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