Odour-mediated response to plants by evarcha culicivora, a blood-feeding jumping spider from east Africa

Publication Type

Journal Article

Journal Name

International Journal of Biodiversity Science, Ecosystem Services and Management

Publication Date

1-1-2011

Abstract

Field studies were carried out over 2 years (2005-2007) at four locations in Kenya to assess the effects of three plant families (Poaceae, Cyperaceae and Typhaceae) on parasitoid diversity and stem borer parasitism in natural habitats. Field collections were made using destructive sampling. Per locality, stem borer abundance was highest in Poaceae (>69%). Stem borer density per plant (0.081) did not vary amongst plant families within each locality. Stem borer parasitism was highest in Poaceae in most localities (0.49-2.84%). Although stem borer diversity (Shannon index (H')) (H' = 0.09-2.47) did not vary among plant families per locality, stem borer diversity and dominance were positively correlated with parasitism in Poaceae and Cyperaceae. Present results show that Poaceae, Cyperaceae and Typhaceae are important plant families for sustaining parasitoid diversity or function in natural habitats and adjacent cultivated habitats within the cereal crop ecosystem. Wild host plants that harbour parasitoid species or stimulate stem borer activity could also regulate stem borer populations within the cropping ecosystem. Indiscriminate destruction of wild host plants in the Poaceae, Cyperaceae and Typhaceae surrounding cultivated cereal crops should thus be avoided. © 2011 Taylor & Francis.

Keywords

cereal crops, Cyperaceae, ecosystem, natural habitat, parasitoid communities, Poaceae, stem borer parasitism, Typhaceae

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