Crop & Pest Report


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Soybean Aphids Continue Low (08/01/19)

Soybean aphids continue to be very low in ND and MN.

Soybean aphids continue to be very low in ND and MN. This is beginning to sound like a broken record but the IPM Crop Survey observed about 0-10% of plants in field infested and an average of <1 aphid per plant in ND and MN (see maps below). The pie chart map shows the proportion of plants observed by different aphid densities. If the pie chart shows mainly orange to red, this indicates those fields have more plants that are getting closer to the economic threshold of 250 aphid per plant. Thanks to Dr. Phil Glogoza, retired Extension Educator, for creating these useful pie chart maps. Maps are posted weekly on the NDSU IPM website. Please send me any field reports on soybean aphids.



Janet J. Knodel

Extension Entomologist

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