Figure 2From: Plant genetic variation mediates an indirect ecological effect between belowground earthworms and aboveground aphidsAphid growth rate as a function of plant variety and earthworm presence in the experiment. Aphids were counted after 14 days and growth rate calculated separately for each species. There was a significant effect of the plant-by-earthworm interaction on the growth rate of A. fabae. Error bars represent ±1 SE.Back to article page