Insect Alert For

Soybean Aphid

Risk Level:
Moderate Risk
Affected Area:
Full page
Alert Details

Soybean aphid populations are expected to increase on a scattered basis in the week ahead, especially with favorable weather likely across the northern soybean-growing region where soybean aphids are most prevalent. Moderate risks are now in the forecast across Minnesota, western Wisconsin, far northern Iowa, and into eastern South Dakota and far southeast North Dakota where a higher percentage of the soybean crop is already in or expected to be in reproductive growth stages where yield loss from soybean aphid damage is most likely. High temperatures in the mid 70s to mid 80s and generally light rainfall amounts, if any, is likely in the week ahead and this will provide an ideal environment for soybean aphid populations to grow rapidly where present. Pressure is not expected to be widespread, but growers in or near the Moderate risk area are strongly encouraged to scout soybean fields that are in early reproductive stages of growth (between R1-R5) until the field surpasses the R5 growth stage. Low risks extend as far south as northeast Nebraska, central Iowa, and far northern Illinois and east to Lake Michigan for the next week.