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Article
Are Late-Season Soybean Aphid Treatments Worth It?
Integrated Crop Management News
  • Erin W. Hodgson, Iowa State University
  • Matthew E. O'Neal, Iowa State University
Document Type
Article
Publication Date
8-8-2009
Abstract
As soybean fields enter seed set, growers are getting concerned about late-season soybean aphid infestations. And with good reason - winged aphids are everywhere and some areas are experiencing increasing aphid densities. There is much evidence to show treating aphids when they exceed the economic threshold (250 aphids per plant with increasing populations on 80 percent of the plants) up to R5.5 will protect yield. But what happens if aphid populations are still increasing past seed set? This was the trend in 2008 when aphid populations were still increasing into September. So do late season insecticides financially make sense for managing soybean aphid? This is a difficult topic for us to discuss because of the lack of replicated data throughout the North Central Region.
Copyright Owner
Iowa State University
Language
en
File Format
application/pdf
Citation Information
Erin W. Hodgson and Matthew E. O'Neal. "Are Late-Season Soybean Aphid Treatments Worth It?" (2009)
Available at: http://works.bepress.com/erin_hodgson/119/