Late season soybean aphids have been popping up in southwestern Minnesota. University of Minnesota Extension Integrated Pest Management Specialist Bruce Potter says although they’re not in every field, some producers have sprayed as the populations are at economic thresholds.

He says threshold levels for soybean aphids are generally 250 per plant average.

Potter says when the aphid infestations occur later in the development stage of the soybean plant they do less damage and have less of an impact on soybean yields.

Potter says part of the reason the aphids have shown up later this year than normal is many of the soybeans in the area were planted later.