Onderzoekingen over levenswijze en bestrijding van den witten rijstboorder op Java

P. van der Goot

    Research output: Thesisinternal PhD, WU

    Abstract

    For practical control, a study was made of Scirpophaga innotata Wlk., a noxious rice stalk borer in certain regions of Java.
    Caterpillars normally developed and pupated in stalks that had not reached the stage of ear formation. In paddy from before flowering, however, caterpillars entered into a resting stage (diapause), induced by food rich in carbohydrates and proteins.

    After harvest diapausing caterpillars remained in the stubble. Further development started after at least 3 months diapause and the stubble and the soil were wetted. This was usually with the first heavy rainfall in the west monsoon. The longer the diapause the sooner moths appeared; with a 3 months' diapause moths emerged 80 days after rainfall began, with a 6 months' diapause after a mean of 33 days.

    The cultural practice of timed rice sowing was introduced. Sowing started not earlier than one month after the first rains had fallen. Thus infestation of the young fields was prevented for the greater part.
    Original languageDutch
    QualificationDoctor of Philosophy
    Awarding Institution
    Supervisors/Advisors
    • Roepke, W.K.J., Promotor, External person
    Award date5 Feb 1925
    Place of PublicationWageningen
    Publisher
    DOIs
    Publication statusPublished - 5 Feb 1925

    Keywords

    • insects
    • plant pests
    • rice
    • oryza sativa
    • lepidoptera
    • indonesia
    • java
    • netherlands east indies

    Cite this