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Extension > Minnesota Crop News > July 2011

Wednesday, July 6, 2011

Aphids in Small Grains and Soybeans: an update from NW MN

update prepared by Dr. Ian MacRae, UMN Extension Entomologist, NWROC-Crookston

Many field projects are underway and we're scouting small grain and soybean fields to stay on top of what is happening with aphid populations in these crops. Following are comments based on what our field visits are revealing in northwest Minnesota.

Small Grain Aphids

There have been reports of wheat fields in the area with aphid populations reaching or exceeding treatment thresholds. Remember the treatment threshold for aphids in small grains is 8 out of 10 stems with one or more aphids (this will average out to at least 12-15 aphids per stem).
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