Plant species composition alters the sign and strength of an emergent multi-predator effect by modifying predator foraging behaviour.

The time budgets of individual insects showed that Adalia spent a larger percentage of time foraging on the aphid-infested plant than Chysoperla (41% vs 25%; F 1,118 = 5.08; P = 0.026) and there was a highly significant effect of the predator combination within species (F 6,112 = 7.74; P<0.001; Fig. 4 ).

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