Appendix S1 Overall mean densities of natural enemies, and the range of densities among plots or fields, measured in agricultural fields nearby to our study site.

Appendix S2 Repeated measures analyses of the effects of (A) predator presence and (B) predator diversity on aphid densities.

Appendix S3 Per capita by true predator taxon of (A) adult survivorship and (B) juvenile production.

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