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Insects

Title:		Electrophysiological Responses of Eighteen Species of Insects to Fire Ant Alarm Pheromone
Author(s):		Du Y; Grodowitz MJ; Chen J;
Address:		"National Biological Control Laboratory, Biological Control of Pests Research Unit, Agriculture Research Service, United States Department of Agriculture, 59 Lee Road, Stoneville, MS 38776, USA"
Journal Title:		Insects
Year:		2019
Volume:		20191114
Issue:		11
Page Number:		-
DOI:		10.3390/insects10110403
ISSN/ISBN:		2075-4450 (Print) 2075-4450 (Electronic) 2075-4450 (Linking)
Abstract:		"Olfaction plays a dominant role in insect communication. Alarm pheromones, which alert other insects of the same species of impending danger, are a major class of releaser pheromones. The major components of alarm pheromones in red imported fire ants, honeybees and aphids have been identified as 2-ethyl-3,6-dimethylpyrazine (2E-3,6-DP), isopentyl acetate (IPA), and E-beta-farnesene (EbetaF), respectively. In this study, electroantennography (EAG) responses to EDP (a mixture of 2-ethyl-3,6-dimethylpyrazine and 2-ethyl-3,5-dimethylpyrazine), IPA and EbetaF were investigated in a wide range of insect species. Beside imported fire ants, the EDP (2-ethyl-3,6(5)-dimethylpyrazine) elicited significant EAG response from all other tested insects, including six ant species and one hybrid ant, honeybee, bagrada bug, lady beetle, housefly, small hive beetle, yellow fever mosquito, termite, bedbug, water hyacinth weevil, southern green stink bug and two aphid species. In contrast, IPA elicited significant EAG response only in the honeybee, red imported fire ant, an Aphaenogaster ant, and the water hyacinth weevil. The EbetaF only elicited EAG responses in two aphids, small hive beetle and housefly. The results clearly indicate that EDP can be detected by widespread insect species that did not coevolve with S. invicta and further suggested alkylpyrazine may activate multiple generally tuned olfactory receptors (ORs) across a wide number of insect species"
Keywords:		Alarm pheromone Eag Gc-ead Solenopsis invicta semiochemical;
Notes:		"PubMed-not-MEDLINEDu, Yuzhe Grodowitz, Michael J Chen, Jian eng Switzerland 2019/11/20 Insects. 2019 Nov 14; 10(11):403. doi: 10.3390/insects10110403"