Fig. 2From: Cucumber mosaic virus and its 2b protein alter emission of host volatile organic compounds but not aphid vector settling in tobaccoSettlement of aphids on infected tobacco under normal illumination. Pots contained two plants infected either with CMV strain Fny (Fny-CMV), the 2b gene deletion mutant (Fny-CMVΔ2b), or a plant that had been mock inoculated with water (mock). Ten to 15 wingless adult aphids (M. persicae) were placed in a microfuge tube that was equidistant between each pair of plants (plants placed 9 cm apart). The number of aphids that settled on each plant was recorded at 0.25, 1 and 24 h after aphid release. Panels a-d show the combined data for six experiments carried out under normal illumination (16 h photoperiod). In each panel (a-d), the bar chart shows the experimental data; the lower graph shows the posterior density of the parameters p 0.25, p 1 and p 24, the probabilities of choosing to settle on an infected plant conditional on settling at t = 0.25 h, t = 1 h and t = 24 h, respectively. The legend gives mean values and 95% credible intervals for each parameter: these are also shown graphically below the x-axis (dot is the mean; line shows the credible interval). Panel c shows that the data support a slightly reduced probability of aphids choosing to settle on CMV-infected plants over mock-inoculated ones at 0.25, 1 and 24 h (95% credible interval for the probability of settling on an infected plant conditional on settling was 0.36–0.48 for p 0.25 , 0.40–0.49 for p 1, 0.40–0.49 for p 24)Back to article page