Figure 3
The effect of concentration of volatile extract (E) and a 16-component synthetic blend (B) on the behaviour of Cimex lectularius in a still-air olfactometer. Concentrations tested were 6.75, 13.50, and 27.00 BBEXPH (hours of bed bug-exposed paper air entrainment extract; or 2, 4 and 8% of the extract, respectively) for both extracts and blends. The response due to a positive control of bed bug-exposed paper (BBEXP) and a negative control of solvent (re-distilled diethyl ether, CON) are shown for comparison. Bars represent mean differences in (a) visits to pots (SED 1.428 visits), and (b) time spent in zones (s, SED 206.5 s) between odour and no-odour pots and zones, respectively. Means ± standard error; bars labelled ‘a or b’ are significantly different (at the 5% level using restricted maximum likelihood analysis) from the negative or positive control, respectively.
