noneEnter The soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), is an important insect pest of soybean, a major crop in South Dakota. First discovered in the USA in 2000, it was accidentally introduced from Asia and spread quickly throughout Midwest. Insecticides are currently the primary control method for this pest, but biological control[long dash]control of pests through beneficial species[long dash]is a promising management approach. Soybean aphid is seldom a problem in its native Asia largely because of a group of natural enemies that feed on it. Universities and USDA entomologists have identified the Asian parasitoid Binodoxys rommunis (Gahan) (Hymenoptera: Braconidae) as a promising species to release in the US for biological control of the soybean aphid. Since 2007 South Dakota has been part of a multi-state project to introduce B. comrnunis to the region. In the summer of 2008 seven Midwestern states participated in parasitoid releases. Releases in South Dakota were a cooperative effort between SDSU scientists, Extension Educators, and South Dakota producers. We released B. communis in ten soybean fields in ten counties in eastern South Dakota. We inoculated release sites with a small number of parasitoids which might increase and spread over time. Two weeks after release we recovered parasitoids in eight of ten fields. BR Animals and man. Control. Parasites diseases and disorders. Parasites. Insect parasites. Hosts. Insect hosts. Habitat. Man made habitat. Zoogeography. Dispersal. Means of dispersal. Land zones. Nearctic region. North America. USA. Aphis glycines (Aphidoidea): Host, Parasite; Binodoxys communis (Aphidiidae): Parasite. Aphis glycines: Biological control, Biocontrol potential, Hymenopteran parasites, Binodoxys communis, Plant hosts, Soybean, Hymenopteran parasites introduction, Cultivated land habitat, Soybean crops, South Dakota; Binodoxys communis: Biological control, Biocontrol potential, Hemipteran hosts, Aphis glycines, Cultivated land habitat, Soybean crops, Introduction, South Dakota. ST Animalia, Arthropoda, Insecta, Hemiptera, Homoptera, Sternorrhyncha, Aphidoidea; Animalia, Arthropoda, Insecta, Hymenoptera, Apocrita, Terebrantia, Ichneumonoidea, Aphidiidae. Arthropods; Hymenopterans; Insects; Invertebrates; True Bugs.