Table 2. Gas chromatographic relative time (Rt) in minutes, quantities (ng) and percentage composition (in brackets) of the terpene components found in hexane extracts from male L. longipalpis collected from 3 locations in Brazil; Barra de Guaratiba (BG), Pancas and Teresina.

Pheromone type	Rt (min)	BG (n = 6)	Pancas (n = 13)	Teresina (n = 14)
9MGB	14.96	10.85a±2.65 (54.4%)	x	8.76a±3.98 (88.1%)
	21.01	2.08±0.68 (10.4%)	x	x
	22.28	2.20b±0.60 (11.0%)	x	0.87b±0.22 (8.8%)
diterpenes (cembrene isomers)	22.79	x	x	x
	22.95	3.06c±0.85 (15.3%)	2.36c±0.43 (89.4%)	x
	23.08	1.77d±0.54 (8.9%)	0.28d±0.16 (10.6%)	x
	21.12	x	x	0.31±0.06 (3.1%)

Peaks with superscript a are confirmed as (S)-9-methylgermacrene-B (9MGB) (mw 218 amu). Other peaks are characterized as diterpenes (cembrene isomers) (mw 272 amu) and those with the same superscript b, c, or d have mass spectra which match each other closely; x indicates that the compound was not found in the extracts; n is the number of individuals of each population examined.