# Rain-soaked harvest raises quality red flags: What it means for yields and basis in the western Corn Belt - Pro Farmer

> A historically wet September in the western Corn Belt has caused disease pressure to build in standing crops. Agronomists are finding Diplodia and Fusarium ear rots, weak stalks, lodging and elevated mycotoxin risk in corn, and fungal problems in soybeans. Iowa's corn harvest was 7% complete versus a 20% five-year average, and Nebraska was nine points behind its average.

- Date: 2026-10-07 · published 2026-10-07T12:00:00.000Z
- Category: disease · region US · magnitude medium
- Page: https://feedsoft.ai/events/12956-rain-soaked-harvest-raises-quality-red-flags-what-it-means-for-yields-and-basis
- Commodities: [Corn](https://feedsoft.ai/c/CORN.md), [Soybeans](https://feedsoft.ai/c/SOY.md)

## Why it matters

Lower grain quality and mycotoxin risk can reduce usable supply and widen basis discounts for affected corn. USDA's upcoming production update may show lower state yields in Iowa and Nebraska, supporting prices.

## Read by commodity

- SOY: bullish ▲
- CORN: bullish ▲

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| CORN | 2025-10-01 | [Corn diseases lurk in bumper US crop, threatening yields](https://feedsoft.ai/events/22896-corn-diseases-lurk-in-bumper-us-crop-threatening-yields.md) | +1.4% | +2.3% |
| CORN | 2024-08-27 | [Argentine farmers eye pivot to soy on corn plague fears, rain outlook](https://feedsoft.ai/events/13908-argentine-farmers-eye-pivot-to-soy-on-corn-plague-fears-rain-outlook.md) | +3.7% | +8.4% |
| CORN | 2025-08-29 | [Is the U.S. Corn and Soybean Crop Getting Smaller? - AgWeb](https://feedsoft.ai/events/13062-is-the-u-s-corn-and-soybean-crop-getting-smaller-agweb.md) | +3.3% | +8.5% |
| CORN | 2022-11-11 | [Egg prices soar as farmers battle inflation, avian flu](https://feedsoft.ai/events/38685-egg-prices-soar-as-farmers-battle-inflation-avian-flu.md) | +3.0% | -3.8% |
| CORN | 2019-04-22 | [What happens to hog prices this summer?](https://feedsoft.ai/events/59724-what-happens-to-hog-prices-this-summer.md) | -1.1% | +2.5% |
| SOY | 2025-08-29 | [Is the U.S. Corn and Soybean Crop Getting Smaller? - AgWeb](https://feedsoft.ai/events/13062-is-the-u-s-corn-and-soybean-crop-getting-smaller-agweb.md) | -2.1% | -1.4% |
| SOY | 2022-11-11 | [Egg prices soar as farmers battle inflation, avian flu](https://feedsoft.ai/events/38685-egg-prices-soar-as-farmers-battle-inflation-avian-flu.md) | -0.9% | +3.7% |
| SOY | 2021-04-02 | [Bad weather and the spread of highly pathogenic avian influenza (AI) increase agricultural and livestock prices in South Korea](https://feedsoft.ai/events/12940-bad-weather-and-the-spread-of-highly-pathogenic-avian-influenza-ai-increase.md) | +0.1% | +12.1% |

## Sources

- profarmer.com: https://www.profarmer.com/news/agriculture-news/rain-soaked-harvest-raises-quality-red-flags-what-it-means-yields-and-basis-western-corn-belt

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.