, Volume 29, Issue 1, pp 29–39 | Cite as

Introduction and evaluation ofChilocorus bipustulatus [Col.: Coccinellidae] for control ofParlatoria blanchardi [Hom.: Diaspididae] in date groves of Niger

  • Philip A. Stansly


Chilocorus bipustulatus L. was successfully established in oases of the Aïr Mountain region of Northern Niger (West Africa), where it became the major cause of mortality among adult females of the armored scaleParlatoria blanchardi Targioni-Tozzetti. This resulted in significantly lower scale infestation of date palms in a test plot when compared to a control with no introduced ladybeetles. The coccinellids were able to reproduce year-round, but during the hot season were largely confined to natural refuges composed of dense stands of date palms. Dispersal and multiplication occurred primarily during the rainy season, toward the end of which the greatest suppression of scale populations was seen.


Plant Pathology Rainy Season Adult Female Mountain Region Dense Stand 
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Chilocorus bipustulatus L. a été établi avec succés dans les oasis des montagnes de l'Aïr, au nord du Niger, où il est devenu la cause principale de mortalité des adultes femelles de la cochenille,Parlatoria blanchardi Targoni-Tozzetti. Il en résulta un taux d'infestation des dattiers expérimentaux significativement plus bas par rapport au témoin sans coccinelles introduites. Apte à la reproduction toute l'année, la coccinelle se limitait aux touffes denses de dattiers qui constituaient des abris naturels pendant la saison sèche. Elle se dispersait et se multipliait surtout durant la saison pluvieuse, vers la fin de laquelle, on assistait à la plus grande réduction de la population de cochenille.


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Copyright information

© Lavoisier Abonnements 1984

Authors and Affiliations

  • Philip A. Stansly
    • 1
  1. 1.Department of EntomologyTexas A&M UniversityCollege StationU.S.A.

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