Aphidius ervi preferentially attacks the green morph of the pea aphid, Acyrthosiphon pisum

Details

Serval ID
serval:BIB_55C96AFF7257
Type
Article: article from journal or magazin.
Collection
Publications
Title
Aphidius ervi preferentially attacks the green morph of the pea aphid, Acyrthosiphon pisum
Journal
Journal of Insect Behavior
Author(s)
Libbrecht  R., Gwynn  D. M., Fellowes  M. D. E.
ISSN
0892-7553
Publication state
Published
Issued date
01/2007
Peer-reviewed
Oui
Volume
20
Number
1
Pages
25-32
Notes
Old month value: Jan
Abstract
The pea aphid, Acyrthosiphon pisum Harris (Hemiptera: Aphididae) is found in red and green color morphs. Previous work has suggested that the aphidiine parasitoid Aphidius ervi Haliday preferentially attacks green pea aphids in the field. It is not clear whether these results reflect a real preference, or some unknown clonal difference, such as in immunity, between the aphids used in the previous studies. We used three susceptibility-matched pairs of red and green morph pea aphid clones to test for preferences. In a no-choice situation, the parasitoids attacked equal proportions of each color morph. When provided with a choice, A. ervi was significantly more likely to oviposit into colonies formed from green morphs when the neighboring colony was formed from red morph aphids. In contrast, red morphs were less likely to be attacked when their neighboring colony was of the green morph. By preferentially attacking green colonies, A. ervi may reduce the likelihood of intraguild predation, as it is suggested that visually foraging predators preferentially attack red aphid colonies. Furthermore, if this host choice behavior is replicated in the field, we speculate that color morphs of the pea aphid may interact indirectly through their shared natural enemies, leading to intraspecific apparent competition.
Web of science
Create date
19/11/2007 11:27
Last modification date
20/08/2019 15:10
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