Figure 3. Mean (± SEM) cumulative numbers of Spodoptera litura egg masses (data pooled from three surveys of 80 plants/plot) on tobacco plants in plots with different trap crop rows in a field trial where pupae of S. litura were inoculated in the soil. Histograms bearing the same letters were not significantly different (one-way ANOVA followed by Fisher's LSD, α = 0.05).