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Prey preference and reproductive success of the predatory mite Neoseiulus idaeos On the prey species Mononychellus tanajoa and Tetranychus lombardinii

Published online by Cambridge University Press:  19 September 2011

H. van den Berg  and
R. H. Markham
H. van den Berg
Affiliation:
Department of Entomology, P.O. Box 8031, 6700 EH Wageningen, The Netherlands
R. H. Markham
Affiliation:
commonwealth Institute of Biological Control, P.O. Box 30148, Nairobi, Kenya
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Abstract

Cassava green mite (CGM), Mononychellus tanajoa s.l., originating from South America, has become a serious pest in Africa, where it often occurs in mixed infestations with indigenous spider mites like Tetranychus lombardinii. The neotropical phytoseiid Neoseiulus idaeus is a candidate predator for classical biological control of CGM. Its prey preference and reproductive success on CGM and T. lombardinii were studied in the laboratory. Foraging individually on leaf discs, N. idaeus consumed CGM and T. lombardinii adult females equally in single-species populations but showed a distinct preference for CGM when both species were presented together at the same density. The predators developed and reproduced equally well on CGM and T. lombardinii.

Résumé

Originaire de l'Amérique du Sud, l'acarien vert du manioc, Mononychellus tanajoa s.l. a pris une ampleur considérable en Afrique, où il se manifeste parallèlement aux acariens indigènes tels Tetranychus lombardinii. Neoseiulus idaeus, un phytoséiide provenant de la zone intertropicale du Nouveau-Monde, est un prédateur potentiellement intéressant dans le cadre de la lutte biologique classique contre l'acarien vert. Les études de laboratoire ont porté sur ses préférences alimentaires et sa faculté de reproduction sur les acariens verts et T. lombardinii. N. idaeus consomma tant les femelles adultes des acariens verts que celles de T. lombardinii, lorsque chaque espèce était placée individuellement sur des disques de feuille; par contre, il marqua une nette préférence pour les acariens verts dans une population mixte comprenant les deux espèces à densité égale. Le prédateur se développa et se reproduisit avec la même facilité sur les acariens verts et sur T. lombardinii.

Keywords

Cassava green mitebiological controlprey-preferencereproductive successMononychellusTetranychidaeNeoseiulus idaeusPhytoseiidaeAcarien vert du manioclutte biologiquepréférence prédatricefaculté de reproductionMononychellusTetranychidaeNeoseiulus idaeusPhytoseiidae
Type
Symposium XI: Africa-wide Biological Control Programme of Cassava Pests
Information
International Journal of Tropical Insect Science , Volume 8 , Issue 4-5-6: Recent Advances in Research on Tropical Entomology , December 1987 , pp. 867 - 869
Copyright
Copyright © ICIPE 1987

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