Plant phenolics mediated bottom‐up effects of elevated CO₂ on Acyrthosiphon pisum and its parasitoid Aphidius avenae

Elevated concentrations of atmospheric CO 2 can alter plant secondary metabolites, which play important roles in the interactions among plants, herbivorous insects and natural enemies. However, few studies have examined the cascading effects of host plant secondary metabolites on tri‐trophic interactions under elevated CO 2 (eCO 2 ). In this study, we determined the effects of eCO 2 on the growth and foliar phenolics of Medicago truncatula and...