Attack rate and success of the parasitoid Diaeretiella rapae on specialist and generalist feeding aphids

Lipaphis erysimi (Kaltenbach) is a specialist crucifer feeding aphid and Myzus persicae (Sulzer) is a generalist feeding aphid. The foraging behavior of Diaeretiella rapae (McIntosh), a parasitoid with the ability to parasitize both of these species, was assessed using a series of attack rate and su...

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Bibliographic Details
Published in:Journal of chemical ecology 2004-09, Vol.30 (9), p.1781-1795
Main Authors: Blande, J.D, Pickett, J.A, Poppy, G.M
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Aphididae
Aphids - physiology
Autoecology
Bioassays
Biological and medical sciences
Biological Assay
Biological control
Braconidae
Brassica - metabolism
Brassica - parasitology
Brassica rapa
Brassicaceae
Control
Diaeretiella rapae
Female
Fundamental and applied biological sciences. Psychology
glucosinolates
insect pests
Insects
Lipaphis erysimi
Male
Myzus persicae
Pest Control, Biological
Phytopathology. Animal pests. Plant and forest protection
Plant Leaves - chemistry
Protozoa. Invertebrata
Protozoa. Invertebrates
Time Factors
Vegetables - metabolism
Vegetables - parasitology
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Summary:Lipaphis erysimi (Kaltenbach) is a specialist crucifer feeding aphid and Myzus persicae (Sulzer) is a generalist feeding aphid. The foraging behavior of Diaeretiella rapae (McIntosh), a parasitoid with the ability to parasitize both of these species, was assessed using a series of attack rate and success bioassays, with turnip, Brassica rapa var rapifera, as the host plant. The attack rate of D. rapae was significantly greater on L. erysimi than on M. persicae when aphids were feeding on turnip leaf discs in Petri dishes, irrespective of the aphid species upon which the parasitoids were originally reared. Attack rate bioassays with leaf discs absent, using both satiated and starved aphids, revealed that background chemistry and internal aphid chemistry may have small effects on attack rate. Excision of D. rapae pupae from mummy cases and subsequent use of the fully developed adults in attack rate bioassays showed that cues received by D. rapae at the time of adult emergence provide cues that prime D. rapae to attack L. erysimi at a greater rate than M. persicae. However, the relative success of D. rapae on these two aphid species, in terms of the percentage of attacks resulting in a successful adult parasitoid, was not significantly different.
ISSN:0098-0331
1573-1561
DOI:10.1023/b:joec.0000042401.52088.54