Figure 1
The effect of increasing concentration of the volatile extract from bed bug-exposed paper on the behaviour of Cimex lectularius in a still-air olfactometer (inset). Extract concentrations (E) tested were 0.0675, 0.675, and 6.75 BBEXPH (hours of bed bug-exposed paper air entrainment extract; or 0.02, 0.20 and 2.00% of the extract, respectively). The response due to a positive control of bed bug-exposed paper (BBEXP) and a negative control of solvent (re-distilled diethyl ether) are shown for comparison. Bars represent mean differences in (a) visits to pots (SED 1.193 visits), and (b) time spent in zones (s, SED 109.2 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. Bars labelled ‘ns’ were not significantly different from either control.
