Host strain specific sex pheromone variation in Spodoptera frugiperda

Table 2 Reported sex pheromone components of S. frugiperda

Female sex pheromone						Synthetic lures that attracted most males
	Fl, USA¹	French Guyana²	Brazil³	Corn*	Rice*	PA, USA⁴	Fl, ** USA^1,5	Mexico⁶	Costa Rica⁷	French Guyana²	Brazil³
Z11-16:Ac (m)	9	16.66	12.9	12.4	7.3	17.69		10.3		15.5
Z9-14:Ac (M)	69	73.75	82.8	81.7	82.4	81.61	99.42	77.8	99.4	83	98
14:Ac (a)		0.53		1.1	1.1
Z11-14:Ac (b)		1.2	1.5	1.1	1.6
12:Ac (c)		0.43	0.6	1.1	1.9
Z9-12:Ac (d)	2	0.5	trace	0.8	2.1	0.25				0.5
Z7-12:Ac (e)	4	1.12	0.8	1.8	3.6	0.45	0.58	11.9	0.6	1	1
E7-12:Ac			1.2								1
Z9-14:Al	13	3.59
Z10-14:Ac			0.3
16:Ac		0.21
Z11-16:Al	3

All numbers in one column add to 100%. Female sex pheromone refers to gland extracts. Tumlinson et al. (1986) also analyzed the volatile blend emitted from the glands and found 2.6% Z11-16:Ac, 90.1% Z9-14:Ac, 1.2% Z11-14:Ac, 1.9% 12:Ac, 2.2% Z9-12:Ac, 0.21% 16:Ac and 3.2% Z7-12:Ac. Note that the Z9-14:Al which was found in the gland extracts, was not found in the emitted volatiles. Compounds in bold are the compounds that we could identify in the gland extracts studied here; all of these were found in both strains. Letters behind these compounds are given the facilitate the reading. *Means of the relative amounts that we found in glands extracted from females in the scotophase. ** In FL the same 4-component blend as used by Fleischer et al. (2005) was tested and attracted similar amounts of males as the 2-component blend.¹[23]; ²[24]; ³[25]; ⁴[29]; ⁵[28]; ⁶[27]; ⁷[26].

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