Table 1.

Total and mean (±SE) number of Anopheles gambiae attracted by carbon dioxide produced in a dual-choice assay in a screen house between molasses treatments (test combinations of molasses and dry yeast dissolved in 2 L water) and a reference treatment (250 g refined sugar, 17.5 g dry yeast and 2 L water)

Molasses treatments	N	n	Mean ± SE number of mosquitoes attracted		P-value
			Molasses treatment	Reference treatment
125 g molasses - 17.5 g yeast - 2 L water	4	507	61.5 ± 4.0	65.3 ± 4.0	0.51
125 g molasses - 8.75 g yeast - 2 L water	4	417	35.8 ± 3.0	68.5 ± 4.1	0.001
250 g molasses - 17.5 g yeast - 2 L water	4	460	70 ± 4.2	45.0 ± 3.4	0.001
250 g molasses - 35 g yeast - 2 L water	4	371	50.8 ± 3.6	42.0 ± 3.2	0.07
500 g molasses - 17.5 g yeast - 2 L water	4	545	79.3 ± 4.5	57.0 ± 3.8	0.001
500 g molasses - 35 g yeast - 2 L water	4	440	50.8 ± 3.6	59.3 ± 3.9	0.11

N is the number of experimental nights, n is the total number of mosquitoes caught whereas SE is the standard error of the mean catch per night. A total of 200 female An. gambiae were released per night. Pairwise comparisons in the same row of mean catches differ significantly at P <0.05 (Chi-square test).