Insect Alert For

Soybean Aphid

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

Soybean aphid populations continue to pose a threat to late or replanted soybean fields especially in the upper Midwest. Growers from eastern North Dakota east into northwest and central Minnesota as well as northwest Wisconsin that have fields at or prior to R6 growth stage are encouraged to continue to scout those fields even if they were previously treated. Some re-infestations are ongoing in scattered areas. Low risks continue from northeast Nebraska into eastern South Dakota, far northern Iowa, remaining portions of Minnesota, central and northern Wisconsin, lower Michigan, and southern Ontario, Canada. A rather strong cold front is predicted to pass through the Midwest next week and soybean aphids may be inclined to migrate back to their primary host (buckthorn) at that time. Until that occurs, however, soybean fields at or prior to R6 in their growth will remain at risk.