# The Disease That Didn't Show Up: 2026 Proves You Can't Farm by the Rearview Mirror

> Southern rust, which caused heavy losses in 2025, did not spread widely in the 2026 US Corn Belt despite abundant moisture and favorable conditions. Growers instead faced a mix of foliar diseases and later stalk, crown and ear rots. Extension pathologists advise against planning next year's fungicide use based only on this season.

- Date: 2026-11-13 · published 2026-11-14T00:11:47.555Z
- Category: disease · region US · magnitude low
- Page: https://feedsoft.ai/events/98604-the-disease-that-didn-t-show-up-2026-proves-you-can-t-farm-by-the-rearview
- Commodities: [Corn](https://feedsoft.ai/c/CORN.md)

## Why it matters

Lower-than-feared disease pressure supports yields and the corn supply outlook, which weighs mildly on prices. Growers who over-applied fungicides may cut back, which affects input demand more than grain supply.

## Read by commodity

- CORN: neutral

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| CORN | 2019-07-26 | [China's duck farmers cash in as disease slashes pork output](https://feedsoft.ai/events/58086-china-s-duck-farmers-cash-in-as-disease-slashes-pork-output.md) | -2.2% | -10.6% |
| CORN | 2024-10-11 | [U.S. farmers call for vaccines to fight avian flu \| The Western Producer](https://feedsoft.ai/events/27869-u-s-farmers-call-for-vaccines-to-fight-avian-flu-the-western-producer.md) | -1.8% | +0.9% |
| CORN | 2026-10-06 | [South Korea's 2025-26 HPAI season cut layer flock by 13.6%
						 \| The Poultry Site](https://feedsoft.ai/events/17125-south-korea-s-2025-26-hpai-season-cut-layer-flock-by-13-6-the-poultry-site.md) | -1.8% | -5.6% |
| CORN | 2026-04-25 | [Weekly pig report: Disease pressure adds increased risk to hog supply outlook
						 \| The Pig Site](https://feedsoft.ai/events/19865-weekly-pig-report-disease-pressure-adds-increased-risk-to-hog-supply-outlook.md) | +1.7% | +2.4% |
| CORN | 2026-10-22 | [The Birds Come Back: Korea's Avian Flu Season and the Price of an Egg \| The Ag Digest](https://feedsoft.ai/events/17127-the-birds-come-back-korea-s-avian-flu-season-and-the-price-of-an-egg-the-ag.md) | -1.2% | — |

## Sources

- agweb.com: https://www.agweb.com/news/crops/corn/disease-didnt-show-2026-proves-you-cant-farm-rearview-mirror

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