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Soybean aphid update

UMN Extension scouts spent considerable time in Minnesota soybean fields last week.

Fewer than 25 percent of plants in two soybean fields in Polk County and a single soybean field in both Fillmore and Houston Counties were infested with soybean aphid (Figure 1).
Figure 1. Fewer than 25 percent of surveyed plants in four Minnesota soybean fields were infested with soybean aphids July 12-26, 2019. Map: NDSU IPM.

Of those plants within the four infested fields, average population densities were between 1 and 20 soybean aphids per plant (Figure 2).
Figure 2. Soybean aphid population densities remained low between July 12 and 26, 2019. Map: NDSU IPM.

Wishing you continued scouting vigilance and sub-threshold soybean aphid population densities.
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