« Previous Abstract"Odour-mediated responses of a predatory mirid bug and its prey, the two-spotted spider mite"    Next AbstractA deubiquitinating enzyme interacts with SIR4 and regulates silencing in S. cerevisiae »

Insect Sci

Title:		"Influence of cornicle droplet secretions of the cabbage aphid, Brevicoryne brassicae, on parasitism behavior of naive and experienced Diaeretiella rapae"
Author(s):		Moayeri HR; Rasekh A; Enkegaard A;
Address:		"Department of Plant Protection, Faculty of Agriculture; Research Institute of Physiology and Biotechnology, University of Zanjan"
Journal Title:		Insect Sci
Year:		2014
Volume:		20130405
Issue:		1
Page Number:		56 - 64
DOI:		10.1111/1744-7917.12022
ISSN/ISBN:		1744-7917 (Electronic) 1672-9609 (Linking)
Abstract:		"Insects have evolved amazing methods of defense to ward off enemies. Many aphids release cornicle secretions when attacked by predators and parasitoids. These secretions contain an alarm pheromone that alerts other colony members of danger, thereby providing indirect fitness benefits to the releaser. In addition, contact with cornicle secretions could also threaten an attacker and could provide direct fitness to the releaser. However, cornicle secretions may also be recruited as a kairomonal cue by aphid natural enemies. In this study, we investigated the effect of the cornicle droplet volatiles of the cabbage aphid, Brevicoryne brassicae (L.), on the host-searching behavior of naive and experienced female Diaeretiella rapae (M(') Intosh) parasitoids in olfactometer studies. In addition, we evaluated the role of B. brassicae cornicle droplets on the oviposition preference of the parasitoid in a two-choice bioassay. Naive females did not exhibit any preference between volatiles from aphids secreting cornicle droplets over non-secreting aphids, while experienced parasitoids exploited the secretions in their host location. Experienced females were also able to choose volatiles from both secreting and non-secreting aphids over clean air, while this ability was not observed in naive females. Although secretion of cornicle droplets did not influence the percentage of first attack in either naive or experienced females, the success of attack (i.e. resulting in a larva) was significantly different between secreting and non-secreting aphids in the case of experienced parasitoids"
Keywords:		Animals Aphids/chemistry/*metabolism Female Host-Parasite Interactions/drug effects Male Oviposition/drug effects Pheromones/*metabolism/pharmacology Wasps/drug effects/*physiology Y-tube olfactometer alarm pheromone kairomone learning oviposition prefere;
Notes:		"MedlineMoayeri, Hamid R S Rasekh, Arash Enkegaard, Annie eng Australia 2013/08/21 Insect Sci. 2014 Feb; 21(1):56-64. doi: 10.1111/1744-7917.12022. Epub 2013 Apr 5"