Figure 1. Down-regulation of plant defence by T. evansi.

a Mean (+s.e.m.) oviposition rate of T. urticae on tomato leaf discs with damage and web of T. evansi (dam.+web), on leaf discs with damage by T. evansi, but without web (dam.), and on clean leaf discs (clean). b Mean (+s.e.m.) oviposition rate of T. evansi on tomato leaf discs with damage and web of T. urticae, on leaf discs with damage but without web of T. urticae, and on clean leaf discs. Different letters denote significant differences among treatments (lme with log likelihood ratio test). Experiments of panels a and b were not carried out at the same time for logistical reasons. Treatments should therefore be compared to the control carried out at the same time, presented in the same panel. Numbers inside the bars give number of replicates.