Figure 1: Total number of M. pygmaeus choosing either odour source in pair-wise comparisons between plants exposed to different R:FR light ratios (+FR = 0.6, CL = 1.2 and -FR = 8.2) and either infested with T. vaporariorum whiteflies (WF) or uninfested (U). P-values in bold indicate a significant preference for either odour source (two-sided binominal test). For each pair-wise comparison, 130 predators were tested. NC = no choice.