| landscape diversity enhances biological control of an introduced crop pest in the north-central usa. | arthropod predators and parasitoids provide valuable ecosystem services in agricultural crops by suppressing populations of insect herbivores. many natural enemies are influenced by non-crop habitat surrounding agricultural fields, and understanding if, and at what scales, land use patterns influence natural enemies is essential to predicting how landscape alters biological control services. here we focus on biological control of soybean aphid, aphis glycines matumura, a specialist crop pest rec ... | 2009 | 19323179 |