Weather will affect how much disease pressure we see in 2026
Due to the beautiful weather we have seen in Iowa recently, which has included some cool and wet nights, tar spot has already been detected in some fields across the state. However, this week’s much hotter temperatures should suppress any additional pressure from tar spot for the time being. Dan Bjorklund, technical agronomist at Landus Cooperative, said the weather in July will play a huge role in determining what disease pressure we will see this crop season. Southern rust, which became a...













