The sound of birds chirping can only mean one thing: spring is approaching. This season is often referred to as the season of love, and soybean aphids are no stranger to its universal language.
Threshold levels may be determined by scouting fields. For the 2013 growing season, scouting for insect pests is especially important. According to the Penn State University Extension, trends point to higher populations of soybean aphids during odd-numbered years.