# A screwworm fly that bedeviled cattle ranchers decades ago has returned to Texas

> The USDA confirmed New World screwworm fly in southern Texas, the first US appearance since 1966, after a calf near LaPryor tested positive. A quarantine zone was set up and sterile fly releases are planned to prevent establishment.

- Date: 2023-10-22 · published 2023-10-22T12:00:00.000Z
- Category: disease · region US · magnitude high
- Page: https://feedsoft.ai/events/33562-a-screwworm-fly-that-bedeviled-cattle-ranchers-decades-ago-has-returned-to-texas
- Commodities: [Live Cattle](https://feedsoft.ai/c/LCATTLE.md), [Feeder Cattle](https://feedsoft.ai/c/FCATTLE.md)

## Why it matters

A confirmed US detection raises the risk of movement restrictions and herd losses in Texas, tightening cattle supply and adding price support for cattle futures.

## Read by commodity

- FCATTLE: bullish ▲
- LCATTLE: bullish ▲

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| LCATTLE | 2026-06-04 | [Texas Ranchers Brace as New World Screwworm Returns to US Soil After 6 Decades](https://feedsoft.ai/events/12087-texas-ranchers-brace-as-new-world-screwworm-returns-to-us-soil-after-6-decades.md) | +0.6% | -1.0% |
| LCATTLE | 2026-06-09 | [Texas screwworm case drives cattle rally](https://feedsoft.ai/events/18947-texas-screwworm-case-drives-cattle-rally.md) | +0.7% | -2.1% |
| LCATTLE | 2025-08-15 | [In Texas cattle country, ranchers brace for flesh-eating screwworms \| Reuters](https://feedsoft.ai/events/23280-in-texas-cattle-country-ranchers-brace-for-flesh-eating-screwworms-reuters.md) | +1.1% | -0.1% |
| LCATTLE | 2025-01-13 | [Mexican cattle banned from Texas due to screwworm threat - The Texas Tribune](https://feedsoft.ai/events/26445-mexican-cattle-banned-from-texas-due-to-screwworm-threat-the-texas-tribune.md) | +0.4% | +3.2% |
| LCATTLE | 2026-05-20 | [Ranchers herd it all as fewer cattle pressure beef prices; screwworm lurks - Dallasfed.org](https://feedsoft.ai/events/19198-ranchers-herd-it-all-as-fewer-cattle-pressure-beef-prices-screwworm-lurks.md) | -1.7% | -1.2% |
| FCATTLE | 2026-06-04 | [Texas Ranchers Brace as New World Screwworm Returns to US Soil After 6 Decades](https://feedsoft.ai/events/12087-texas-ranchers-brace-as-new-world-screwworm-returns-to-us-soil-after-6-decades.md) | +3.4% | +5.3% |
| FCATTLE | 2026-06-09 | [Texas screwworm case drives cattle rally](https://feedsoft.ai/events/18947-texas-screwworm-case-drives-cattle-rally.md) | +3.1% | +3.2% |
| FCATTLE | 2025-01-13 | [Mexican cattle banned from Texas due to screwworm threat - The Texas Tribune](https://feedsoft.ai/events/26445-mexican-cattle-banned-from-texas-due-to-screwworm-threat-the-texas-tribune.md) | +0.4% | -1.6% |

## Sources

- newsbot3000.com: https://www.newsbot3000.com/story/6a20e425b7f991ecc30dbe30

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