An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
LockA locked padlock
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Image Number D939-1
Close-up of stem rust on wheat.
Photo by Cereal Disease Lab.
640 pixels wide: (d939-1.jpg)