Factors affecting the patch-leaving decision of the parasitic wasp Diadegma semiclausum (Hymenoptera: Ichneumonidae)

Abstract We studied factors affecting the patch-leaving decision of the parasitic wasp Diadegma semiclausum, a parasitoid of diamondback moth (Plutella xylostella) larvae. Experiments were performed in a wind tunnel. We focused on two factors: (1) volatiles from host-food plants (infested or uninfes...

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Published inApplied Entomology and Zoology Vol. 38; no. 2; pp. 211 - 214
Main Authors Ohara, Y. (Kyoto Univ. (Japan)), Takafuji, A, Takabayashi, J
Format Journal Article
LanguageEnglish
Published JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY 2003
Subjects
BEHAVIOUR
Brassica
BRASSICA OLERACEA
cabbage plants
DIADEGMA
Diadegma semiclausum
HABITATS
Hymenoptera
Ichneumonidae
MOTIVATION
PARASITOIDS
patch-leaving decision
PLUTELLA XYLOSTELLA
wind tunnel
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Summary:Abstract We studied factors affecting the patch-leaving decision of the parasitic wasp Diadegma semiclausum, a parasitoid of diamondback moth (Plutella xylostella) larvae. Experiments were performed in a wind tunnel. We focused on two factors: (1) volatiles from host-food plants (infested or uninfested by hosts) upwind of the patch, and (2) the condition of the currently inhabited patch (the leaf). Irrespective of the upwind odor source, the wasp stayed longer on the infested patch than on the intact patch. The presence or absence of host larvae in the infested patch did not affect the time spent in the patch. Further, we found that the wasp used plural cues in the currently inhabited patch in their patch-leaving decision. Factors affecting the patch-leaving decision of the parasitic wasp were discussed in tritrophic contexts .
Bibliography:2004003664
H10
ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0003-6862
1347-605X
DOI:10.1303/aez.2003.211