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Volatile and Contact Chemicals Released byNezara viridula(Heteroptera:Pentatomidae) Have a Kairomonal Effect on the Egg ParasitoidTrissolcus basalis(Hymenoptera: Scelionidae)

Authors
Journal
Biological Control
1049-9644
Publisher
Elsevier
Publication Date
Volume
16
Issue
3
Identifiers
DOI: 10.1006/bcon.1999.0763
Keywords
  • Trissolcus Basalis
  • Nezara Viridula
  • Egg Parasitoid
  • Pheromone
  • Kairomone
  • Host Location
  • Arrestment
  • Foraging Behavior.
Disciplines
  • Biology
  • Chemistry
  • Ecology

Abstract

Abstract The responses of females of the egg parasitoid Trissolcus basalis (Wollaston) (Hymenoptera: Scelionidae) to volatile and contact chemicals from its host Nezara viridula (L.) (Heteroptera: Pentatomidae) were investigated in a Y-tube olfactometer and under open arena conditions. In the Y-tube tests, volatiles from virgin males and from females in a preovipositional state attracted T. basalis females, while volatiles from host virgin females did not. In an open arena, traces left by N. viridula adults in different physiological conditions function as contact cues inducing the wasps to remain longer in the arena and to change the pattern of their walking behavior. However, only contact kairomones from N. viridula mated females in a preovipositional condition induced an arrestment response characterized by an increase in patch searching time and turning rates and a reduction in linear speed. The chemical ecological implications of these results on this host–parasitoid association are discussed.

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