Slow spring for soybean aphids Jun 1, 2011 8:00 am by jmu@illinois.eduNatural History Survey Share on Facebook Tweet Email Images INHS Entomologist Dave Voegtlin conducted his annual spring survey for soybean aphids on buckthorn in Indiana and Michigan. He found the majority of locations had no soybean aphids and only a few sites had low numbers of colonies. Share on Facebook Tweet Email