Regional Updates
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September 23, 2025Content Author
With harvest getting underway around the state, ISU Extension and Outreach field agronomists share a quick update on initial harvest progress as well as other observations they have made or are hearing about in their respective regions including fall armyworms being found in forages and concerns about stalk integrity in cornfields. Read on for more specifics.
Leah Ten Napel (Region 1):Cherokee, Ida, Lyon, Monona, O'Brien, Osceola, Plymouth, Sioux, Woodbury counties
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September 9, 2025Content Author
As we approach the end of the 2025 growing season, several stressors such as the excessive moisture in July and disease pressure have accelerated crop development across the state, particularly in corn. With silage harvest either well underway or wrapping up in many areas, combines are beginning to roll through corn fields. Read on for more details about what ISU Extension and Outreach field agronomists are seeing and hearing from fields across Iowa.
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August 26, 2025Content Author
As we near the end of the growing season, corn across the state is mostly in the R5 stage with some already reaching R6. Corn silage harvest is underway. Soybeans are mainly late R5 to R7. Observations from fields or topics of concern continue to center around southern rust, tar spot, sudden death syndrome (SDS), and weed escapes.
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August 19, 2025Content Author
More rainfall in areas, southern rust, SDS, white mold, western bean cutworm, and fall armyworms were some of the concerns or issues observed in fields across the state this last week. ISU Extension and Outreach field agronomists share more specifics about what is happening or being seeing in their respective regions across the state below in the last week.
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August 12, 2025Content Author
The wetter conditions are continuing from July into August with rainfall totals in the last two weeks across the state ranging from 1 to 6 plus inches. Some isolated areas in south-central Iowa received between 6 to 7 inches of rain alone over this last weekend. The biggest concerns coming in from fields across the state are more disease-related with sudden death syndrome becoming more apparent in soybean fields across the state and southern rust in corn. ISU Extension and Outreach field agronomists share more specifics about what is happening in their respective regions across the state below.
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July 15, 2025Content Author
Crop conditions across Iowa continue to look pretty good overall. Some isolated areas might not look as good due to the wetter conditions or recent storm damage. Soybean gall midge, corn rootworm, weed escapes, and foliar diseases/fungicide application decisions were some of the concerns seen or heard from extension field agronomists in the last week. Read on for more specifics about what is happening in crop fields around the state.
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July 8, 2025Content Author
Tassels started showing in cornfields across the state, while soybean fields are flowering and some are starting to set pods. ISU Extension field agronomists reported a range of concerns and observations over the past week, including potential herbicide failures, low levels of foliar diseases such as gray leaf spot, tar spot, and northern corn leaf blight, rootworm injury, and soybean gall midge being found in two new counties. Below, field agronomists share more details about what they’re seeing in their respective regions.
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July 1, 2025Content Author
While some areas across the state were grateful for recent rainfall, others received excessive amounts, resulting in standing water in fields and raising concerns about nitrogen needs for corn. Along with the wetter conditions, ISU Extension field agronomists reported observations and inquiries about wind and hail damage from localized storms, the presence of Japanese beetles, corn rootworm injury, herbicide drift issues, weeds surviving herbicide applications, and what’s being seen for disease pressure so far. Read on for more insights into what’s being seen in fields across the state.
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June 24, 2025Content Author
Heavy rainfall in areas, isolated hail, herbicide injury, weeds surviving post herbicide applications, and nutrient deficiencies were some of the common issues seen by ISU Extension field agronomists this last week. Read on for more specifics about what is happening across the state from your local ISU Extension and Outreach field agronomists.
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June 17, 2025Content Author
Hail damage in parts of northern Iowa, herbicide injury, weeds not dying, true armyworms, and nutrient deficiencies were some of the more common issues seen by ISU Extension field agronomists this last week. Read on for more specifics about what is happening across the state from your local ISU Extension and Outreach field agronomists.
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May 20, 2025Content Author
It was a warm, dry, and windy week across the state last week. Planting is winding down across the state, and the early planted corn fields are reaching the V4-V5 stages and soybeans earlier planted soybeans are around V1. Weeds coming through PRE herbicides, soil crusting, replant decisions, sand-blasting/leaf-tattering, and herbicide/seed treatment injury were some of the common issues or concerns heard by the ISU Extension field agronomists.
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May 6, 2025Content Author
Fieldwork and planting were limited in some areas of the state over the past week due to wet weather and unsuitable field conditions. Nearly 50% of the corn and about 40% of the soybean crop have been planted statewide. Earlier-planted corn and soybean fields have emerged. So far, aside from weeds, minimal pest pressure or other major issues have been noted in fields across the state. ISU Extension and Outreach field agronomists provide more specific updates about conditions in the regions they cover below.
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April 22, 2025Content Author
This last week was another week filled with a lot of field activity happening around the state, including quite a bit of corn and soybeans being planted. ISU Extension and Outreach field agronomists provide updates on activities occurring in their respective regions and agronomic considerations to keep on your radar.
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April 15, 2025Content Author
Fieldwork has been bustling across the state over the last week and the first part of this week, ranging from tillage and fertilizer applications to spraying and the planting of corn and soybeans. Below, ISU Extension and Outreach field agronomists provide updates on activities occurring in their respective regions and agronomic considerations to keep on your radar.