Figure 2. Whiteflies settling on the adaxial and abaxial leaflet surfaces of ‘Moneymarker’ and ABL 14-8.

Free-choice and non-choice preference assays of B. tabaci on the adaxial and abaxial leaflet surfaces of‘Moneymaker’ and ABL 14-8 nearly-isogenic tomato lines at four and ten-leaf growth stage. Mean number of whiteflies per six leaflets under non-choice conditions and mean number of whiteflies per three leaflets under free-choice conditions on the adaxial (black bars) and abaxial (grey bars) leaflet surfaces of ‘Moneymaker’ and ABL 14-8 at different time intervals after release of 30 whiteflies per test in the centre of the arena. Asterisks indicate significant differences (P<0.05) between both the abaxial and the adaxial leaf surfaces at each time interval using Mann-Whitney U-test. Bars indicate the standard error of the mean.