De chemische en biologische bestrijding van de spintmijt Tetranychus urticae Koch

L. Bravenboer

    Research output: Thesisinternal PhD, WU


    Glasshouses have a favourable climate for greenhouse red spider mite, which can rapidly proliferate. Up to 1959 its practical control has been by chemicals only. Bravenboer studied whether biological control was also possible.
    Chemical treatment acted as a density-independent factor and was unable to regulate the population. It must frequently be repeated and would certainly lead eventually to resistance of the mite, so causing a failure of chemical control in the future.

    The predators Stethorus punctillum and Typhlodromus longipilus could act as density-dependent factors and regulate the population of Tetranychus urticae. Although the conditions for biological control were favourable in greenhouses, the predators alone were seldom able to give economic control of T.urticae. A single application of a selective acaricide per year gave adequate control.

    The first chapters deal also with taxonomic problems over Tetranychus urticae, with the influence of temperature on the development of both T. urticae and its mentioned predators, their egg production, their diapause (not for Typhlodromus longipilus), the influence of the host plant on the reproduction of T. urticae and many observations on the behaviour of predators in the presence of their prey.
    Original languageDutch
    QualificationDoctor of Philosophy
    Awarding Institution
    • Wageningen University
    • de Wilde, J., Promotor, External person
    Award date13 Nov 1959
    Place of PublicationWageningen
    Print ISBNs9789022000175
    Publication statusPublished - 1959


    • plant pests
    • mites
    • tetranychus urticae
    • natural enemies
    • plant protection
    • insecticides
    • acaricides
    • molluscicides
    • biological control
    • stethorus punctillum
    • typhlodromus
    • fungicides
    • integrated pest management

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