Northwest Iowa Extension Crop and Pest Information by Todd Vagts ISU Extension Crops Specialist Counties Served:  Carroll, Calhoun, Crawford, Ida, Monona, Pocahontas and Sac.
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Soybean Aphid

Estimate aphid population growth potential with the SAGE model developed by researchers at the University of MN.

Population growth estimates for Carroll and Pocahontas, IA on August 1is as follows

Visit ISU's www.soybeanaphid.info

A new ISU soybean aphid publication is available online at:  http://www.extension.iastate.edu/Publications/SP247.pdf

Soybean Aphid (rapid) scouting procedure:  http://www.soybeans.umn.edu/crop/insects/aphid/aphid_sampling.htm

ISU Integrated Crop Management Newletter Articles:
Aphids found in Iowa, treatment thresholds (06/14/04):
http://www.ipm.iastate.edu/ipm/icm/2004/6-14-2004/soyaphid.html
Scouting and Mngt. considerations (06/14/04):
http://www.ipm.iastate.edu/ipm/icm/2004/6-14-2004/soythreshold.html
Scientific papers published (05/03/04):
http://www.ipm.iastate.edu/ipm/icm/2004/5-3-2004/soybeanaphid.html

University of Minnesota: 
http://www.soybeans.umn.edu/crop/insects/aphid/aphid.htm

Plant Health Inititative (Excellent quick reference):
http://www.planthealth.info/soyaphid.htm
http://www.planthealth.info/soyaphid/sbatmt.htm (labeled insecticides)

University of Wisconsin: Treatment threshold and Soybean Growth Stage Comparison
http://www.planthealth.info/soyaphid/uwexsoystage.pdf
 

Current Data (2005)

2005 Aphid Population Growth Parameters for N.W. Iowa (coming soon)
Source, transport and local condition details.

2004 Aphid Population Growth Parameters for N.W. Iowa
Source, transport and local condition details.

Take the survey:  Soybean Aphid Insecticide Treatment Yield Comparison

2003 Survey Results (PDF file)
2003 Survey Results Graphed (PDF file)

Click on this hyperlink for Pictures of Soybean Aphid, Honeydew, sooty mold, plant stress symptomology and beneficial insects from central IA.

Other Information Sources
University of Minnesota: 
http://www.soybeans.umn.edu/crop/insects/aphid/aphid.htm
Insecticide and application performance trials: 
 http://www.soybeans.umn.edu/crop/insects/aphid/aphid_management.htm

University of Wisconsin:
Aphid Biology: http://www.plantpath.wisc.edu/soyhealth/aglycine.htm
Aphid Publication:  http://www.plantpath.wisc.edu/soyhealth/virus/aphid2003.pdf

Iowa State University:
ICM Newsletter: http://www.ipm.iastate.edu/ipm/icm/

North Dakota State University: 
http://www.ext.nodak.edu/extpubs/plantsci/pests/e1232w.htm

South Dakota State University
http://plantsci.sdstate.edu/ent/entpubs/FS914_Soy_Aphid2.pdf

Soybean Aphid Watch: 
http://www.pmcenters.org/Northcentral/Saphid/Aphidindex.htm

Plant Health Initiative (Soybean Aphid Research Review, 2004)
http://www.planthealth.info/aphidinsert/aphidinsert.htm

Photos
http://www.inhs.uiuc.edu/cbd/aphid/photos.html

Scouting form
http://www.soybeans.umn.edu/pdfs/MultiStateSoybeanAphidSurvey.pdf