Figure 2.

Settling choice test results. Settling preference of treated leaves (Table 1, treatment 2) vs. control leaves scored after 5, 24, and 48 hours. Although avoidance of treated leaves was clear in all three plant/aphid combinations, the wheat/ Rhopalosiphum padi combination showed this avoidance only after 48h. Bars represent 100%, i.e. all insects on any leaf in each replicate, (25–35 choice tests in total for each plant/aphid combination) were statistically tested with Mann-Whitney U-test (p < 0.005)