Table 1.

Mean number (±SE) of Anopheles gambiae mosquitoes attracted to MM-X traps containing the reference (MB5 + CO₂) and test treatments (MB5 + dilution ‘X’ of 2-butanone) of candidate synthetic mosquito attractant blends

Exp	Dilution of 2-butanone (‘X’), %	N	n	%Response	Mean (±SE) mosquito catches		Exp (B)
					Reference (MB5 + CO2)	Test treatment (MB5 + ‘X’)
1	99.5	4	622	77.75	122.75 ± 5.54	32.75 ± 2.86	3.748*
2	10	4	559	69.88	122.75 ± 5.54	17.00 ± 2.06	7.221*
3	1.0	4	588	73.50	118.75 ± 5.45	28.25 ± 2.66	4.204*
4	0.1	4	526	65.75	115.00 ± 5.36	16.50 ± 2.03	6.970*
5	0.01	4	415	51.88	89.75 ± 4.74	14.00 ± 1.87	6.411*
6	0.004	4	543	67.88	118.50 ± 5.44	17.25 ± 2.08	6.870*
7	0.001	4	535	66.88	118.00 ± 5.43	15.75 ± 1.98	7.492*
8	0.0004	4	483	60.38	106.50 ± 5.16	14.25 ± 1.89	7.474*

The number of replicates (N), the number (n) and percentage (%) of trapped mosquitoes, test statistic {Exp(B)} and the level of statistical significance (* indicates P < 0.001) in each dual choice experiment is shown. 800 female An. gambiae were released across each series of four replicates