Soybean aphids (SBA) have been spotted in a few fields in southern Ontario that haven’t seen SBA in quite a few years. As soybeans begin to enter R1, weekly scouting is advised, focusing first on the earlier planted fields close to or in R1, as well as any that have not had much rain and may be moisture stressed. A reminder that SBA start as colonies in a few pockets in the field before becoming overcrowded and spreading themselves out more evenly across the fields. These highly infested pl...
