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Scouting Soybean Aphids in Wisconsin

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Published on Jul 10, 2013

Dr. Eileen Cullen, University of Wisconsin Extension Entomologist, takes you
into the field for a short discussion about scouting for soybean aphids.

Economic threshold is reached when a field average is 250 aphids/plant and populations are actively increasing. To calculate a field average, count the number of aphids on each of 20-30 plants/field, from a sample representative of at least 80% of the field.

Begin field scouting in late June (late vegetative to beginning bloom soybean growth stages), making one or two visits/field/week. Continue scouting until aphid populations decline, usually mid to late August.

Key publications:

Should I Spray for Soybean Aphid?
http://ipcm.wisc.edu/download/pubsPM/...

Pest Management in Wisconsin Field Crops (A3646)
http://learningstore.uwex.edu/Assets/...

For more information, visit http://www.entomology.wisc.edu/cullenlab and http://ipcm.wisc.edu

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