For Online Use:

• Images may be used without written permission by K-12 or higher education faculty and students in web pages, presentations and homework assignments.
• Images may be used without written permission by United States federal, state and local governments in web pages and presentations.
• Image use not covered by the above provisions requires written permission from the copyright holder and may require payment of royalties.
• In all cases, use of images must be accompanied by appropriate credit citation and copyright notice.

For Printed Material:

Most images found on our website are not a suitable resolution for printing. To obtain higher resolution files and permission to use images in print publications please email us at . High resolution images are available for many but not all images found online. Please reference the URL of the image when making your request.

Please credit the Plant & Pest Diagnostic Laboratory, Purdue University for any use of images found on this site.