Winged soybean aphids fly from buckthorn to soybean where they give birth to live aphids. (Marlin E. Rice)
Links:
[1] http://www.ipm.iastate.edu/ipm/icm/2006/1-23/learned.html
[2] http://www.ipm.iastate.edu/ipm/icm/2006/6-5/aphids.html
[3] http://www.ipm.iastate.edu/ipm/icm/2006/7-24/aphids.html
