Low levels of southern rust observed across Iowa | Integrated Crop Management
July 17, 2025| Integrated Crop Management
July 17, 2025| Integrated Crop Management
Southern rust has continued to spread across Iowa and increase in severity since the disease was first reported in mid-July. This is not surprising considering the weather we have been having. July was warm and extremely wet across the state, and the precipitation has continued through this first 10 days of August.| Integrated Crop Management
Summer precipitation summary| Integrated Crop Management
This is part one of a three-part series on nitrogen management this spring. Read part two, “Navigating Nitrogen Management in Wet Spring Conditions – Estimating Nitrogen Losses,” and part three, “Navigating Nitrogen Management in Wet Spring Conditions – Does the corn need more nitrogen?”.| Integrated Crop Management
This is part two of a three-part series on nitrogen management this spring. Read part one, “Navigating Nitrogen Management in Wet Spring Conditions – Nitrogen Loss Mechanisms,” and part three, “Navigating Nitrogen Management in Wet Spring Conditions – Does the corn need more nitrogen?”.| Integrated Crop Management
This is part three of a three-part series on nitrogen management this spring. Read part one “Navigating Nitrogen Management in Wet Spring Conditions – Nitrogen Loss Mechanisms” and part two “Navigating Nitrogen Management in Wet Spring Conditions – Estimating Nitrogen Losses.”| Integrated Crop Management
Late-season nitrogen rescue applications aren’t always necessary—but this year, many Iowa fields are showing signs that they might be. Between above-average precipitation, early N loss, and delayed sidedress applications, the conditions for in-season N deficiency are widespread. If you see visual signs of deficiency and your crop still has strong potential, a rescue application applied as soon as possible could help recover some yield potential. Ultimately, applying some N is often better...| Integrated Crop Management
Continued above average rainfall from April through May has led to flooded fields and conditions that are too wet to plant or do field work in parts of Iowa. Early June planting decisions surrounding your delayed and prevented planting provision should involve a conversation with your crop insurance provider. The Ag Decision Maker File A1-57 talks about the insurance provision implications related to late planting, prevent planting, and replanting decisions in Iowa.| crops.extension.iastate.edu
Flooding or flood damage in parts of Iowa, corn starting to tassel, corn rootworm, potato leafhoppers, waterhemp suriving post herbicide applications, and herbicide injury due to carryover or drift were "highlights" Iowa State University Extension and Outreach field agronomists saw over the last week. Read on for more specifics about what’s happening in fields across the state.| crops.extension.iastate.edu
