Screwworm Outbreak Tightens U.S. Cattle Supplies as Corn and Soybeans Slip

A livestock‑health outbreak is tightening near‑term beef supplies and raising processing risk while traders watch crop reports and fund flows for grain direction.

Overview

APHIS has reported 15 New World screwworm detections concentrated in Texas and New Mexico, a pest that can force tighter movement of cattle, border controls, and slower packing throughput.
After Thursday's USDA Cattle‑on‑Feed report showed May placements down about 10% and marketings down about 12%, traders pushed cattle futures higher and cash beef prices edged up above $400 per choice box.
Corn and soybean futures have fallen or traded mixed as USDA NASS shows nearly complete crop emergence with mostly good‑to‑excellent ratings and NOAA forecasts that add near‑term moisture for the Corn Belt.
Speculative funds are amplifying short‑term moves: CFTC data show funds cut soybean net longs by roughly 37,900 contracts and added about 41,100 contracts to corn net shorts, and that positioning has pressured oilseed and grain prices.
Discrete demand notes—private soybean sales to China and recent corn shipments to Mexico—provide intermittent support for prices, but ample global supplies and favorable U.S. weather keep upside limited and leave markets volatile.