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Region 5 | July 17, 2025 | Champaign

Nick Seiter
nseiter@illinois.edu

SYNOPSIS

I have received a few reports of corn leaf aphid. This insect should be scouted prior to tasseling, during late vegetative stages; if you have colonies of aphids formed on around 50% of plants at this time, you should consider an insecticide. Beneficial insects and fungal pathogens usually do a number on this pest, and it takes extremely large populations to impact yield.