# Manage Fall Grazing to Reduce Prussic Acid Risk in Cattle

> After the first frost, sorghum, sudangrass and related warm-season annual forages can release prussic acid, a cyanide compound that can kill cattle quickly. Iowa State University Extension advises producers to watch overnight temperatures and pasture conditions before grazing, with grain sorghum carrying the greatest risk.

- Date: 2026-11-11 · published 2026-11-12T15:08:59.404Z
- Category: disease · region US · magnitude low
- Page: https://feedsoft.ai/events/95658-manage-fall-grazing-to-reduce-prussic-acid-risk-in-cattle
- Commodities: [Sorghum](https://feedsoft.ai/c/SORGHUM.md), [Grass Hay](https://feedsoft.ai/c/GRASSHAY.md)

## Why it matters

Grazing restrictions on sorghum and sudangrass reduce usable fall forage, which can push cattle onto harvested feed and modestly lift demand for hay and sorghum feed. The impact on prices is small.

## Read by commodity

- SORGHUM: bullish ▲
- GRASSHAY: bullish ▲

## Sources

- dtnpf.com: https://www.dtnpf.com/agriculture/web/ag/news/article/2026/11/11/manage-fall-grazing-reduce-prussic

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