Articles tagged under: Ian MacRae

Published August 11, 2025

Aphid numbers have dropped off with the rain and high winds. The weekly aphid alert from University of Minnesota Extension Entomologist Ian MacRae, fields that are already colonized may still have significant aphid populations and scouting is still important. The…

Published August 4, 2025

According to the latest update from University of Minnesota Extension Entomologist Ian MacRae, weather conditions favored aphid population growth this past week. The typical late-season increase in soybean aphids is occurring, with those numbers five times higher than they were…

Published April 25, 2025

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…

Published January 18, 2025

Insecticide resistance continues to be a focus. University of Minnesota Extension Entomologist Ian MacRae reminds farmers to stay up to date on their herbicide practices, especially where aphids are involved. "You see an asexual reproduction all the way through the…