Table 1.

Response spectra of the Cx. quinquefasciatus ORNs elicited by various chemostimuli

Sensillum type	Response category	Chemostimuli
Sharp trichoid (A1)	Strong	Rac. Linalool, Eucalyptol, αβ-Thujone, Skatole, Geranylacetone, Rac. 1-Octen-3-ol, Ethylhexanoate
	Mild	Indole, o-Cresol, 6-Methyl-5-hepten-2-one, 5-Methyl-2-hexanone, 2-Heptanone, Citral, Nerol, Geraniol, 4-Methyl-cyclohexanol, Heptalactone
Blunt trichoid (A2)	Strong	Nonanal, Indole, o-Cresol, Heptanal, Octanal
	Mild	Phenol, (E)-2-hexenal, 3 & 6-Methyl indole, 7-Octenoic acid
Grooved peg (A3)	Strong	Ammonia, Trimethylamine, Propylamine, Butylamine
	Mild	Pentanoic acid, Hexanoic acid, Lactic acid, Cadaverine, Putrescine

Responses were categorized based on the counts of action potentials on stimulation with a chemostimuli at 10 μg source dose. Mild, 25–50% increase; strong, 50–100% increase. Percentage increase is determined after the maximum percentage increase of the excitation of a nonanal sensitive ORN (250 spikes/s) in response to 100 ng source dose. All compounds generating strong responses were subsequently tested for dose-response function. Chemicals in boldface are those that were consistently present in human and/or birds. Chemostimuli in each row are arranged according to the response strength (decreasing).