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Table 7 Mean ± SD mosquitoes caught during field experiments by MM-X traps baited with different test odours

From: Sugar-fermenting yeast as an organic source of carbon dioxide to attract the malaria mosquito Anopheles gambiae

Series Test odour An. coustani An. funestus An. gambiae s.l. tot. anoph. Aedes spp. Culex spp. Mansonia spp. tot. non-anoph. tot. mosquitoes
1 no odour 0 ± 0 a 0 ± 0 a 0 ± 0 a 0 ± 0 a 0.4 ± 0.5 a 1.3 ± 1.5 a 0.5 ± 0.8 a 2.1 ± 1.8 a 2.1 ± 1.8 a
  ind. CO2 (250 ml/min) 1.3 ± 2.8 ab 0.1 ± 0.4 a 1.0 ± 2.1 b 2.4 ± 4.8 ab 0.6 ± 0.7 a 7.9 ± 6.9 ab 10.3 ± 7.5 c 18.8 ± 12.6 c 21.1 ± 17.1 c
  yeast CO2 (17.5 g) 0.6 ± 0.7 ab 0.1 ± 0.4 a 0.4 ± 1.1 ab 1.1 ± 1.6 ab 0.1 ± 0.4 a 2.3 ± 2.1 a 4.9 ± 6.5 b 7.3 ± 6.3 b 8.4 ± 6.9 b
  yeast CO2 (35 g) 1.6 ± 1.9 b 0.4 ± 1.1 a 0.5 ± 1.1 ab 2.5 ± 2.9 b 0.5 ± 1.4 a 5.6 ± 6.7 b 8.3 ± 7.9 bc 14.9 ± 14.6 c 17.4 ± 14.0 c
Pnight   0.80 0.17 0.16 0.76 0.29 0.43 0.17 0.15 0.26
Phouse   0.17 0.69 0.01* 0.04 0.87 0.11 0.02 0.01 0.002
Ptreatm   0.14 0.69 0.12* 0.07 0.28 0.007 < 0.001 < 0.001 < 0.001
2 ind. CO2 (250 ml/min) 0.6 ± 1.1 ab 0 ± 0 a 0 ± 0 a 0.6 ± 1.6 a 0.3 ± 0.5 a 4.4 ± 3.9 b 7.3 ± 5.2 a 11.9 ± 8.1 ab 12.5 ± 8.9 ab
  ind. CO2 (250 ml/min) + worn sock 0.8 ± 0.7 b 0.3 ± 0.5 a 1.3 ± 1.8 b 2.3 ± 2.7 b 0.3 ± 0.5 a 5.4 ± 6.0 b 12.9 ± 7.8 a 18.5 ± 10.1 b 20.8 ± 11.9 b
  yeast CO2 (35 g) 0.8 ± 1.0 b 0.1 ± 0.4 a 0.4 ± 1.1 a 1.3 ± 2.1 ab 0.1 ± 0.4 a 2.8 ± 4.4 a 8.1 ± 6.5 a 11.0 ± 7.8 a 12.3 ± 9.2 a
  yeast CO2 (35 g) + worn sock 0 ± 0 a 0.3 ± 0.7 a 1.5 ± 1.6 b 1.8 ± 2.3 ab 0 ± 0 a 1.6 ± 1.7 a 11.9 ± 8.6 a 13.5 ± 8.1 ab 15.3 ± 9.9 ab
Pnight   0.22 0.47 0.32 0.83 0.89 0.001 0.29 0.39 0.44
Phouse   0.02 0.004 < 0.001* 0.001 0.58 < 0.001 0.008 0.004 0.003
Ptreatm   0.05 0.46 0.001* 0.18 0.58 0.003 0.15 0.17 0.16
  1. Yeast = yeast-produced (17.5 g yeast+250 g sugar+2½ L water or 35 g yeast+500 g sugar+2½ L)
  2. Ind. = industrial (250 ml/min)
  3. tot. = total
  4. anoph. = anophelines
  5. Mean numbers caught marked with different letters within a column within same series are significantly different (GLM, P < 0.05)
  6. * interaction between house and treatment (GLM, P = 0.04 in series 1 and P = 0.03 in series 2)