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How Southern Rust changed Iowa corn plans
Just ahead of the 2025 growing season, many in the crop protection industry expected tar spot to be the primary disease concern in corn. Instead, southern rust emerged as the dominant threat across much of Iowa, forcing growers to quickly evaluate their management plans as the season unfolded. Todd Cogdill with FMC says even those watching the disease closely were surprised by how quickly southern rust took over. Instead of tar spot, southern rust became the disease that separated growers who...














