The soybean aphid (Aphis glycines Matsumura) is an insect pest of soybean (Glycine max (L.) Merr.) that is exotic to North America. The soybean aphid is native to Asia. It has been described as a common pest of soybeans in China and as an occasional pest of soybeans in Indonesia,Japan,Korea,Malaysia, the Philippines, and Thailand. The soybean aphid was first documented in North America in Wisconsin in July 2000. Ragsdale et al. (2004) noted that the soybean...