Soybean Aphids Should be on Radar for ’25

Scouting for soybean aphids is recommended this season. University of Minnesota Extension Entomologist Ian MacRae said the temperatures may not have been cold enough to kill off overwintering soybean aphids. “The egg has to be exposed to -27 Fahrenheit to die; I’m not sure we had that widespread in our area this year.” Soybean aphid eggs are laid in buckthorn buds, which would also be a few degrees warmer than the ambient temperature. “Even if we had -27, they may have survived if it wasn’t (that cold) very long and we had a lot of soybean aphids at the end of last year.”