Spatio-temporal distributions of pests and their key parasitoids in a crop of winter oilseed rape: implications for integrated pest management

Ingrid Williams, Andrew Ferguson, H. Barari, J.M. Campbell, Douglas Warner, N.P. Watts, J.E.U. Schmidt

Research output: Contribution to conferenceAbstractpeer-review

Abstract

The spatio-temporal distributions of four major pests (Psylliodes chrysocephala, Meligethes aeneus, Ceutorhynchus pallidactylus and Dasineura brassicae) and of their key larval endoparasitoids were studied in a crop of winter oilseed rape. Insects were sampled at 40 spatially-referenced points within the rape crop and the emergence of those that overwintered in the field was monitored in the following crop of winter wheat. Spatial distributions were mapped, analysed and compared using Spatial Analysis by Distance IndicEs (SADIE). The distributions of most pests and parastoids were complex with differing irregular patterns of aggregation. Some pests were markedly more edge-distributed than others. The environmental factors and behavioural responses of both pests and parasitoids that influence their spatial and temporal ecology will be discussed. The potential value of spatio-temporal information for the development of integrated pest management strategies designed to conserve parasitoids for bio-control by spatial and temporal targeting of insecticides will be considered.
Original languageEnglish
Number of pages1
Publication statusPublished - 21 Aug 2004
EventXXII International Congress of Entomology - Brisbane, Australia
Duration: 15 Aug 200421 Aug 2004

Conference

ConferenceXXII International Congress of Entomology
Abbreviated titleXXII ICE
Country/TerritoryAustralia
CityBrisbane
Period15/08/0421/08/04

Keywords

  • parasitoid
  • oilseed rape
  • biocontrol
  • natural enemy

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