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Strategies Involved in the Location of Hosts by the ParasitoidAphidius erviHaliday (Hymenoptera: Braconidae: Aphidiinae)
This learning ability provides the parasitoid with behavioral plasticity to adapt its responses to suit prevailing foraging opportunities, and attempts are being made to manipulate field populations using host pheromone lures. Expand
Induction and Systemic Release of Herbivore-Induced Plant Volatiles Mediating In-Flight Orientation of Aphidius ervi
- E. Guerrieri, G. Poppy, W. Powell, E. Tremblay, F. Pennacchio
- Journal of Chemical Ecology
- 1 June 1999
In-flight orientation of the braconid Aphidius ervi in response to volatiles released from broad bean plants infested by the pea aphid, Acyrthosiphon pisum, was studied in a no-choice wind-tunnel bioassay and indicated the specificity of synomones elicited by different aphid species on the same plant species. Expand
Biochemical and metabolic alterations in Acyrthosiphon pisum parasitized by Aphidius ervi
The observed biochemical changes in parasitized hosts were synchronized with the major part of parasitoid larval growth and, apparently, strictly related to parasitic castration of the host. Expand
Host regulation effects of ovary fluid and venom of Aphidius ervi (Hymenoptera: Braconidae).
SDS-PAGE analysis of haemolymph samples obtained from pea aphids which had received an injection of combined venom and ovary extract revealed an increase of the titre of various proteins, particularly in the 43-47kDa interval, as registered for truly parasitized hosts. Expand
Development and nutrition of the braconid wasp, Aphidius ervi in aposymbiotic host aphids
The results indicate that the bacterial endosymbionts in parasitized pea aphids are of pivotal importance for the development of A. ervi, with a lower nutritional suitability, showing a significant reduction in the hemolymph of nitrogen-derived compounds of nutritional importance to the developing parasitoid larva. Expand
The expression in tobacco plants of Aedes aegypti Trypsin Modulating Oostatic Factor (Aea-TMOF) alters growth and development of the tobacco budworm, Heliothis virescens
The production and characterisation of transgenic tobacco plantsexpressing a precursor of a regulatory peptide from Aedesaegypti (Trypsin Modulating and Oostatic Factor, Aea-TMOF) whichinterferes… Expand
Host regulation by the aphid parasitoid Aphidius ervi: the role of teratocytes
A tentative physiological model describing the host regulation role played by different parasitoid‐derived factors is proposed. Expand
Biosystematic and morphological study of two Aphidius ervi Haliday (Hymenoptera, Braconidae) 'biotypes' with the description of a new species.
Host regulation effects on Heliothis virescens (F.) larvae inducd by teratocytes of Cardiochiles nigriceps Viereck (Lepidoptera, Noctuidae-Hymenoptera, Braconidae)
All pupae derived from teratocyte injected larvae failed to develop into adults normally obtained from control injected larvae, and the possible role of teratocytes in affecting the biological activity of ecdysteroids is postulated and discussed in a wider context of host-parasitoid physiological interactions. Expand
Alteration of ecdysone metabolism in Heliothis virescens (F.) (Lepidoptera: Noctuidae) larvae induced by Cardiochiles nigriceps Viereck (Hymenoptera: Braconidae) teratocytes
It is suggested that the inhibition of host pupation observed in parasitized H. virescens larvae is due in part to 20-hydroxyecdysone inactivation through the formation of polar metabolites and C. nigriceps teratocytes seem to play an important role in this biochemical transformation. Expand