As soybean fields enter seed set, growers are getting concerned about late-season soybean aphid infestations. So far, much of the state has experienced very low aphid populations. Some fields in northern Iowa exceeded the economic threshold and were treated last week. But in general, most fields have only patchy aphid colonies well below the threshold.
Iowa State University
Hodgson, Erin W. and O'Neal, Matthew E., "Will You Need to Treat for Soybean Aphid This Year?" (2010). Integrated Crop Management News. 392.
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