During 2004 and 2005, we conducted field experiments to test the impact of different guilds
of natural enemies on A. glycines. We contrasted aphid abundance on field cages with ambient levels of small predators (primarily Orius
insidiosus) and parasitoids (primarily Braconidae), sham cages and open controls exposed to large predators (primarily coccinellids), and
cages excluding all natural enemies.